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<a href="../../../Aux/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Aux
|
||
</span>
|
||
|
||
|
||
|
||
<span class="md-nav__icon md-icon"></span>
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item md-nav__item--active md-nav__item--section md-nav__item--nested">
|
||
|
||
|
||
|
||
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4" checked>
|
||
|
||
|
||
|
||
<div class="md-nav__link md-nav__container">
|
||
<a href="../../" class="md-nav__link ">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Lix
|
||
</span>
|
||
|
||
|
||
</a>
|
||
|
||
|
||
<label class="md-nav__link " for="__nav_4" id="__nav_4_label" tabindex="">
|
||
<span class="md-nav__icon md-icon"></span>
|
||
</label>
|
||
|
||
</div>
|
||
|
||
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_4_label" aria-expanded="true">
|
||
<label class="md-nav__title" for="__nav_4">
|
||
<span class="md-nav__icon md-icon"></span>
|
||
Lix
|
||
</label>
|
||
<ul class="md-nav__list" data-md-scrollfix>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../../glossary/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Glossary
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../../quick-start/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Quick Start
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
||
|
||
|
||
|
||
|
||
<a href="../../Advanced-Topics/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Advanced Topics
|
||
</span>
|
||
|
||
|
||
|
||
<span class="md-nav__icon md-icon"></span>
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item md-nav__item--active md-nav__item--nested">
|
||
|
||
|
||
|
||
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4_5" checked>
|
||
|
||
|
||
|
||
<div class="md-nav__link md-nav__container">
|
||
<a href="../" class="md-nav__link ">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Command Reference
|
||
</span>
|
||
|
||
|
||
</a>
|
||
|
||
|
||
<label class="md-nav__link " for="__nav_4_5" id="__nav_4_5_label" tabindex="0">
|
||
<span class="md-nav__icon md-icon"></span>
|
||
</label>
|
||
|
||
</div>
|
||
|
||
<nav class="md-nav" data-md-level="2" aria-labelledby="__nav_4_5_label" aria-expanded="true">
|
||
<label class="md-nav__title" for="__nav_4_5">
|
||
<span class="md-nav__icon md-icon"></span>
|
||
Command Reference
|
||
</label>
|
||
<ul class="md-nav__list" data-md-scrollfix>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../conf-file/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
nix.conf
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../env-common/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Common Environment Variables
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../experimental-commands/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Experimental Commands
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../main-commands/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Main Commands
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item md-nav__item--active">
|
||
|
||
<input class="md-nav__toggle md-toggle" type="checkbox" id="__toc">
|
||
|
||
|
||
|
||
|
||
|
||
<label class="md-nav__link md-nav__link--active" for="__toc">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
nix-build
|
||
</span>
|
||
|
||
|
||
<span class="md-nav__icon md-icon"></span>
|
||
</label>
|
||
|
||
<a href="./" class="md-nav__link md-nav__link--active">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
nix-build
|
||
</span>
|
||
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<label class="md-nav__title" for="__toc">
|
||
<span class="md-nav__icon md-icon"></span>
|
||
Table of contents
|
||
</label>
|
||
<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#synopsis" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
Synopsis
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#disambiguation" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
Disambiguation
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#description" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
Description
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#options" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
Options
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#special-exit-codes-for-build-failure" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
Special exit codes for build failure
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#common-options" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
Common Options
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#common-environment-variables" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
Common Environment Variables
|
||
</span>
|
||
</a>
|
||
|
||
<nav class="md-nav" aria-label="Common Environment Variables">
|
||
<ul class="md-nav__list">
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#xdg-base-directories" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
XDG Base Directories
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
</ul>
|
||
</nav>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#examples" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
Examples
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
</ul>
|
||
|
||
</nav>
|
||
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../nix-channel/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
nix-channel
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../nix-collect-garbage/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
nix-collect-garbage
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../nix-copy-closure/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
nix-copy-closure
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../nix-daemon/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
nix-daemon
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../nix-hash/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
nix-hash
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../nix-instantiate/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
nix-instantiate
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../nix-prefetch-url/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
nix-prefetch-url
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../nix-shell/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
nix-shell
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../opt-common/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Common Options
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../utilities/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Utilities
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
||
|
||
|
||
|
||
|
||
<a href="../New-CLI/nix/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
New CLI
|
||
</span>
|
||
|
||
|
||
|
||
<span class="md-nav__icon md-icon"></span>
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
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|
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|
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|
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|
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|
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|
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|
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|
||
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
||
|
||
|
||
|
||
|
||
<a href="../files/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Files
|
||
</span>
|
||
|
||
|
||
|
||
<span class="md-nav__icon md-icon"></span>
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
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|
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|
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|
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|
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|
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|
||
|
||
|
||
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
||
|
||
|
||
|
||
|
||
<a href="../nix-env/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Nix env
|
||
</span>
|
||
|
||
|
||
|
||
<span class="md-nav__icon md-icon"></span>
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
||
|
||
|
||
|
||
|
||
<a href="../nix-store/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Nix store
|
||
</span>
|
||
|
||
|
||
|
||
<span class="md-nav__icon md-icon"></span>
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
|
||
|
||
</ul>
|
||
</nav>
|
||
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
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|
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|
||
|
||
|
||
|
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|
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|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
||
|
||
|
||
|
||
|
||
<a href="../../Package-Management/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Package Management
|
||
</span>
|
||
|
||
|
||
|
||
<span class="md-nav__icon md-icon"></span>
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
||
|
||
|
||
|
||
|
||
<a href="../../architecture/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Architecture
|
||
</span>
|
||
|
||
|
||
|
||
<span class="md-nav__icon md-icon"></span>
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
||
|
||
|
||
|
||
|
||
<a href="../../contributing/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Contributing
|
||
</span>
|
||
|
||
|
||
|
||
<span class="md-nav__icon md-icon"></span>
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
||
|
||
|
||
|
||
|
||
<a href="../../installation/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Installation
|
||
</span>
|
||
|
||
|
||
|
||
<span class="md-nav__icon md-icon"></span>
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
||
|
||
|
||
|
||
|
||
<a href="../../language/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Language
|
||
</span>
|
||
|
||
|
||
|
||
<span class="md-nav__icon md-icon"></span>
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
||
|
||
|
||
|
||
|
||
<a href="../../protocols/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Protocols
|
||
</span>
|
||
|
||
|
||
|
||
<span class="md-nav__icon md-icon"></span>
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
||
|
||
|
||
|
||
|
||
<a href="../../release-notes/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Release notes
|
||
</span>
|
||
|
||
|
||
|
||
<span class="md-nav__icon md-icon"></span>
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
|
||
|
||
</ul>
|
||
</nav>
|
||
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
||
|
||
|
||
|
||
|
||
<a href="../../../NixOS/appstream/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
NixOS
|
||
</span>
|
||
|
||
|
||
|
||
<span class="md-nav__icon md-icon"></span>
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
||
|
||
|
||
|
||
|
||
<a href="../../../Nixpkgs/" class="md-nav__link">
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Nixpkgs
|
||
</span>
|
||
|
||
|
||
|
||
<span class="md-nav__icon md-icon"></span>
|
||
|
||
</a>
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
|
||
</ul>
|
||
</nav>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
|
||
|
||
|
||
<div class="md-sidebar md-sidebar--secondary" data-md-component="sidebar" data-md-type="toc" >
|
||
<div class="md-sidebar__scrollwrap">
|
||
<div class="md-sidebar__inner">
|
||
|
||
|
||
<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<label class="md-nav__title" for="__toc">
|
||
<span class="md-nav__icon md-icon"></span>
|
||
Table of contents
|
||
</label>
|
||
<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#synopsis" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
Synopsis
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#disambiguation" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
Disambiguation
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#description" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
Description
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#options" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
Options
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#special-exit-codes-for-build-failure" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
Special exit codes for build failure
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#common-options" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
Common Options
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#common-environment-variables" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
Common Environment Variables
|
||
</span>
|
||
</a>
|
||
|
||
<nav class="md-nav" aria-label="Common Environment Variables">
|
||
<ul class="md-nav__list">
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#xdg-base-directories" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
XDG Base Directories
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
</ul>
|
||
</nav>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#examples" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
Examples
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
</ul>
|
||
|
||
</nav>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
|
||
|
||
|
||
<div class="md-content" data-md-component="content">
|
||
<article class="md-content__inner md-typeset">
|
||
|
||
|
||
|
||
|
||
<h1 id="nix-build"><code>nix-build</code></h1>
|
||
<p>Build a Nix expression.</p>
|
||
<h2 id="synopsis">Synopsis</h2>
|
||
<p><code>nix-build</code> [<em>paths…</em>]
|
||
[<code>--arg</code> <em>name</em> <em>value</em>]
|
||
[<code>--argstr</code> <em>name</em> <em>value</em>]
|
||
[{<code>--attr</code> | <code>-A</code>} <em>attrPath</em>]
|
||
[<code>--no-out-link</code>]
|
||
[<code>--dry-run</code>]
|
||
[{<code>--out-link</code> | <code>-o</code>} <em>outlink</em>]</p>
|
||
<h2 id="disambiguation">Disambiguation</h2>
|
||
<p>This man page describes the command <code>nix-build</code>, which is distinct from <a href="../New-CLI/nix3-build/"><code>nix build</code></a>.
|
||
For documentation on the latter, run <code>nix build --help</code> or see <code>man nix3-build</code>.</p>
|
||
<h2 id="description">Description</h2>
|
||
<p>The <code>nix-build</code> command builds the derivations described by the Nix
|
||
expressions in <em>paths</em>. If the build succeeds, it places a symlink to
|
||
the result in the current directory. The symlink is called <code>result</code>. If
|
||
there are multiple Nix expressions, or the Nix expressions evaluate to
|
||
multiple derivations, multiple sequentially numbered symlinks are
|
||
created (<code>result</code>, <code>result-2</code>, and so on).</p>
|
||
<p>If no <em>paths</em> are specified, then <code>nix-build</code> will use <code>default.nix</code> in
|
||
the current directory, if it exists.</p>
|
||
<p>If an element of <em>paths</em> starts with <code>http://</code> or <code>https://</code>, it is
|
||
interpreted as the URL of a tarball that will be downloaded and unpacked
|
||
to a temporary location. The tarball must include a single top-level
|
||
directory containing at least a file named <code>default.nix</code>.</p>
|
||
<p><code>nix-build</code> is essentially a wrapper around
|
||
<a href="../nix-instantiate/"><code>nix-instantiate</code></a> (to translate a high-level Nix
|
||
expression to a low-level <a href="../../glossary/#gloss-store-derivation">store derivation</a>) and <a href="../nix-store/realise/"><code>nix-store
|
||
--realise</code></a> (to build the store
|
||
derivation).</p>
|
||
<div class="admonition warning">
|
||
<p class="admonition-title">Warning</p>
|
||
</div>
|
||
<blockquote>
|
||
<p>The result of the build is automatically registered as a root of the
|
||
Nix garbage collector. This root disappears automatically when the
|
||
<code>result</code> symlink is deleted or renamed. So don’t rename the symlink.</p>
|
||
</blockquote>
|
||
<h2 id="options">Options</h2>
|
||
<p>All options not listed here are passed to
|
||
<a href="../nix-store/realise/"><code>nix-store --realise</code></a>,
|
||
except for <code>--arg</code> and <code>--attr</code> / <code>-A</code> which are passed to <a href="../nix-instantiate/"><code>nix-instantiate</code></a>.</p>
|
||
<ul>
|
||
<li>
|
||
<p><span id="opt-no-out-link"><a href="#opt-no-out-link"><code>--no-out-link</code></a><span></p>
|
||
<p>Do not create a symlink to the output path. Note that as a result
|
||
the output does not become a root of the garbage collector, and so
|
||
might be deleted by <code>nix-store --gc</code>.</p>
|
||
</li>
|
||
<li>
|
||
<p><span id="opt-dry-run"><a href="#opt-dry-run"><code>--dry-run</code></a></span></p>
|
||
<p>Show what store paths would be built or downloaded.</p>
|
||
</li>
|
||
<li>
|
||
<p><span id="opt-out-link"><a href="#opt-out-link"><code>--out-link</code></a></span> / <code>-o</code> <em>outlink</em></p>
|
||
<p>Change the name of the symlink to the output path created from
|
||
<code>result</code> to <em>outlink</em>.</p>
|
||
</li>
|
||
</ul>
|
||
<h2 id="special-exit-codes-for-build-failure">Special exit codes for build failure</h2>
|
||
<p>1xx status codes are used when requested builds failed.
|
||
The following codes are in use:</p>
|
||
<ul>
|
||
<li><code>100</code> Generic build failure</li>
|
||
</ul>
|
||
<p>The builder process returned with a non-zero exit code.</p>
|
||
<ul>
|
||
<li><code>101</code> Build timeout</li>
|
||
</ul>
|
||
<p>The build was aborted because it did not complete within the specified <code>timeout</code>.</p>
|
||
<ul>
|
||
<li><code>102</code> Hash mismatch</li>
|
||
</ul>
|
||
<p>The build output was rejected because it does not match the
|
||
<a href="../../language/advanced-attributes/"><code>outputHash</code> attribute of the derivation</a>.</p>
|
||
<ul>
|
||
<li><code>104</code> Not deterministic</li>
|
||
</ul>
|
||
<p>The build succeeded in check mode but the resulting output is not binary reproducible.</p>
|
||
<p>With the <code>--keep-going</code> flag it's possible for multiple failures to occur.
|
||
In this case the 1xx status codes are or combined using
|
||
<a href="https://en.wikipedia.org/wiki/Bitwise_operation#OR">bitwise OR</a>.</p>
|
||
<div class="highlight"><pre><span></span><code>0b1100100
|
||
^^^^
|
||
|||`- timeout
|
||
||`-- output hash mismatch
|
||
|`--- build failure
|
||
`---- not deterministic
|
||
</code></pre></div>
|
||
<h2 id="common-options">Common Options</h2>
|
||
<p>Most commands in Lix accept the following command-line options:</p>
|
||
<ul>
|
||
<li><span id="opt-help"><a href="#opt-help"><code>--help</code></a></span></li>
|
||
</ul>
|
||
<p>Prints out a summary of the command syntax and exits.</p>
|
||
<ul>
|
||
<li><span id="opt-version"><a href="#opt-version"><code>--version</code></a></span></li>
|
||
</ul>
|
||
<p>Prints out the Lix version number on standard output and exits.</p>
|
||
<ul>
|
||
<li><span id="opt-verbose"><a href="#opt-verbose"><code>--verbose</code></a></span> / <code>-v</code></li>
|
||
</ul>
|
||
<p>Increases the level of verbosity of diagnostic messages printed on standard error.
|
||
For each Lix operation, the information printed on standard output is well-defined;
|
||
any diagnostic information is printed on standard error, never on standard output.</p>
|
||
<p>This option may be specified repeatedly.
|
||
Currently, the following verbosity levels exist:</p>
|
||
<ul>
|
||
<li>
|
||
<p><code>0</code> “Errors only”</p>
|
||
<p>Only print messages explaining why the Lix invocation failed.</p>
|
||
</li>
|
||
<li>
|
||
<p><code>1</code> “Informational”</p>
|
||
<p>Print <em>useful</em> messages about what Lix is doing.
|
||
This is the default.</p>
|
||
</li>
|
||
<li>
|
||
<p><code>2</code> “Talkative”</p>
|
||
<p>Print more informational messages.</p>
|
||
</li>
|
||
<li>
|
||
<p><code>3</code> “Chatty”</p>
|
||
<p>Print even more informational messages.</p>
|
||
</li>
|
||
<li>
|
||
<p><code>4</code> “Debug”</p>
|
||
<p>Print debug information.</p>
|
||
</li>
|
||
<li>
|
||
<p><code>5</code> “Vomit”</p>
|
||
<p>Print vast amounts of debug information.</p>
|
||
</li>
|
||
<li>
|
||
<p><span id="opt-quiet"><a href="#opt-quiet"><code>--quiet</code></a></span></p>
|
||
</li>
|
||
</ul>
|
||
<p>Decreases the level of verbosity of diagnostic messages printed on standard error.
|
||
This is the inverse option to <code>-v</code> / <code>--verbose</code>.</p>
|
||
<p>This option may be specified repeatedly.
|
||
See the previous verbosity levels list.</p>
|
||
<ul>
|
||
<li><span id="opt-log-format"><a href="#opt-log-format"><code>--log-format</code></a></span> <em>format</em></li>
|
||
</ul>
|
||
<p>This option can be used to change the output of the log format, with <em>format</em> being one of:</p>
|
||
<ul>
|
||
<li>
|
||
<p><code>raw</code></p>
|
||
<p>This is the raw format, as outputted by nix-build.</p>
|
||
</li>
|
||
<li>
|
||
<p><code>internal-json</code></p>
|
||
<p>Outputs the logs in a structured manner.</p>
|
||
</li>
|
||
</ul>
|
||
<div class="admonition warning">
|
||
<p class="admonition-title">Warning</p>
|
||
<p>While the schema itself is relatively stable, the format of
|
||
the error-messages (namely of the <code>msg</code>-field) can change
|
||
between releases.</p>
|
||
</div>
|
||
<ul>
|
||
<li>
|
||
<p><code>bar</code></p>
|
||
<p>Only display a progress bar during the builds.</p>
|
||
</li>
|
||
<li>
|
||
<p><code>bar-with-logs</code></p>
|
||
<p>Display the raw logs, with the progress bar at the bottom.</p>
|
||
</li>
|
||
<li>
|
||
<p><span id="opt-no-build-output"><a href="#opt-no-build-output"><code>--no-build-output</code></a></span> / <code>-Q</code></p>
|
||
</li>
|
||
</ul>
|
||
<p>By default, output written by builders to standard output and standard error is echoed to the Lix command's standard error.
|
||
This option suppresses this behaviour.
|
||
Note that the builder's standard output and error are always written to a log file in <code>prefix/nix/var/log/nix</code>.</p>
|
||
<ul>
|
||
<li><span id="opt-max-jobs"><a href="#opt-max-jobs"><code>--max-jobs</code></a></span> / <code>-j</code> <em>number</em></li>
|
||
</ul>
|
||
<p>Sets the maximum number of build jobs that Lix will perform in parallel to the specified number.
|
||
Specify <code>auto</code> to use the number of CPUs in the system.
|
||
The default is specified by the <code>max-jobs</code> configuration setting, which itself defaults to <code>1</code>.
|
||
A higher value is useful on SMP systems or to exploit I/O latency.</p>
|
||
<p>Setting it to <code>0</code> disallows building on the local machine, which is useful when you want builds to happen only on remote builders.</p>
|
||
<ul>
|
||
<li><span id="opt-cores"><a href="#opt-cores"><code>--cores</code></a></span></li>
|
||
</ul>
|
||
<p>Sets the value of the <code>NIX_BUILD_CORES</code> environment variable in the invocation of builders.
|
||
Builders can use this variable at their discretion to control the maximum amount of parallelism.
|
||
For instance, in Nixpkgs, if the derivation attribute <code>enableParallelBuilding</code> is set to <code>true</code>, the builder passes the <code>-jN</code> flag to GNU Make.
|
||
It defaults to the value of the <code>cores</code> configuration setting, if set, or <code>1</code> otherwise.
|
||
The value <code>0</code> means that the builder should use all available CPU cores in the system.</p>
|
||
<ul>
|
||
<li><span id="opt-max-silent-time"><a href="#opt-max-silent-time"><code>--max-silent-time</code></a></span></li>
|
||
</ul>
|
||
<p>Sets the maximum number of seconds that a builder can go without producing any data on standard output or standard error.
|
||
The default is specified by the <code>max-silent-time</code> configuration setting.
|
||
<code>0</code> means no time-out.</p>
|
||
<ul>
|
||
<li><span id="opt-timeout"><a href="#opt-timeout"><code>--timeout</code></a></span></li>
|
||
</ul>
|
||
<p>Sets the maximum number of seconds that a builder can run.
|
||
The default is specified by the <code>timeout</code> configuration setting.
|
||
<code>0</code> means no timeout.</p>
|
||
<ul>
|
||
<li><span id="opt-keep-going"><a href="#opt-keep-going"><code>--keep-going</code></a></span> / <code>-k</code></li>
|
||
</ul>
|
||
<p>Keep going in case of failed builds, to the greatest extent possible.
|
||
That is, if building an input of some derivation fails, Lix will still build the other inputs, but not the derivation itself.
|
||
Without this option, Lix stops if any build fails (except for builds of substitutes), possibly killing builds in progress (in case of parallel or distributed builds).</p>
|
||
<ul>
|
||
<li><span id="opt-keep-failed"><a href="#opt-keep-failed"><code>--keep-failed</code></a></span> / <code>-K</code></li>
|
||
</ul>
|
||
<p>Specifies that in case of a build failure, the temporary directory (usually in <code>/tmp</code>) in which the build takes place should not be deleted.
|
||
The path of the build directory is printed as an informational message.</p>
|
||
<ul>
|
||
<li><span id="opt-fallback"><a href="#opt-fallback"><code>--fallback</code></a></span></li>
|
||
</ul>
|
||
<p>Whenever Lix attempts to build a derivation for which substitutes are known for each output path, but realising the output paths through the substitutes fails, fall back on building the derivation.</p>
|
||
<p>The most common scenario in which this is useful is when we have registered substitutes in order to perform binary distribution from, say, a network repository.
|
||
If the repository is down, the realisation of the derivation will fail.
|
||
When this option is specified, Lix will build the derivation instead.
|
||
Thus, installation from binaries falls back on installation from source.
|
||
This option is not the default since it is generally not desirable for a transient failure in obtaining the substitutes to lead to a full build from source (with the related consumption of resources).</p>
|
||
<ul>
|
||
<li><span id="opt-readonly-mode"><a href="#opt-readonly-mode"><code>--readonly-mode</code></a></span></li>
|
||
</ul>
|
||
<p>When this option is used, no attempt is made to open the Lix database.
|
||
Most Lix operations do need database access, so those operations will fail.</p>
|
||
<div class="admonition warning">
|
||
<p class="admonition-title">Warning</p>
|
||
<p>FIXME(Lix): sometimes you want <code>--store dummy</code> instead, because this option sometimes doesn't work. Document why this is.</p>
|
||
</div>
|
||
<ul>
|
||
<li><span id="opt-arg"><a href="#opt-arg"><code>--arg</code></a></span> <em>name</em> <em>value</em></li>
|
||
</ul>
|
||
<p>This option is accepted by <code>nix-env</code>, <code>nix-instantiate</code>, <code>nix-shell</code> and <code>nix-build</code>.
|
||
When evaluating Nix expressions, the expression evaluator will automatically try to call functions that it encounters.
|
||
It can automatically call functions for which every argument has a <a href="../../language/constructs/#functions">default value</a> (e.g., <code>{ argName ? defaultValue }: ...</code>).</p>
|
||
<p>With <code>--arg</code>, you can also call functions that have arguments without a default value (or override a default value).
|
||
That is, if the evaluator encounters a function with an argument named <em>name</em>, it will call it with value <em>value</em>.</p>
|
||
<p>For instance, the top-level <code>default.nix</code> in Nixpkgs is actually a function:</p>
|
||
<div class="highlight"><pre><span></span><code><span class="p">{</span> <span class="c1">## The system (e.g., `i686-linux') for which to build the packages.</span>
|
||
system <span class="o">?</span> <span class="nb">builtins</span><span class="o">.</span>currentSystem
|
||
<span class="o">...</span>
|
||
<span class="p">}:</span> <span class="o">...</span>
|
||
</code></pre></div>
|
||
<p>So if you call this Nix expression (e.g., when you do <code>nix-env --install --attr pkgname</code>), the function will be called automatically using the value <a href="../../language/builtins/"><code>builtins.currentSystem</code></a> for the <code>system</code> argument.
|
||
You can override this using <code>--arg</code>, e.g., <code>nix-env --install --attr pkgname --arg system "i686-freebsd"</code>.
|
||
(Note that since the argument is a Nix string literal, you have to escape the quotes.)</p>
|
||
<ul>
|
||
<li><span id="opt-argstr"><a href="#opt-argstr"><code>--argstr</code></a></span> <em>name</em> <em>value</em></li>
|
||
</ul>
|
||
<p>This option is like <code>--arg</code>, only the value is not a Nix expression but a string.
|
||
So instead of <code>--arg system "i686-linux"</code> (the outer quotes are to keep the shell happy) you can say <code>--argstr system i686-linux</code>.</p>
|
||
<ul>
|
||
<li><span id="opt-attr"><a href="#opt-attr"><code>--attr</code></a></span> / <code>-A</code> <em>attrPath</em></li>
|
||
</ul>
|
||
<p>Select an attribute from the top-level Nix expression being evaluated.
|
||
(<code>nix-env</code>, <code>nix-instantiate</code>, <code>nix-build</code> and <code>nix-shell</code> only.)
|
||
The <em>attribute path</em> <em>attrPath</em> is a sequence of attribute names separated by dots.
|
||
For instance, given a top-level Nix expression <em>e</em>, the attribute path <code>xorg.xorgserver</code> would cause the expression <code>e.xorg.xorgserver</code> to be used.
|
||
See <a href="../nix-env/install/"><code>nix-env --install</code></a> for some concrete examples.</p>
|
||
<p>In addition to attribute names, you can also specify array indices.
|
||
For instance, the attribute path <code>foo.3.bar</code> selects the <code>bar</code>
|
||
attribute of the fourth element of the array in the <code>foo</code> attribute
|
||
of the top-level expression.</p>
|
||
<ul>
|
||
<li><span id="opt-expr"><a href="#opt-expr"><code>--expr</code></a></span> / <code>-E</code></li>
|
||
</ul>
|
||
<p>Interpret the command line arguments as a list of Nix expressions to be parsed and evaluated, rather than as a list of file names of Nix expressions.
|
||
(<code>nix-instantiate</code>, <code>nix-build</code> and <code>nix-shell</code> only.)</p>
|
||
<p>For <code>nix-shell</code>, this option is commonly used to give you a shell in which you can build the packages returned by the expression.
|
||
If you want to get a shell which contain the <em>built</em> packages ready for use, give your expression to the <code>nix-shell --packages</code> convenience flag instead.</p>
|
||
<ul>
|
||
<li><span id="opt-I"><a href="#opt-I"><code>-I</code></a></span> <em>path</em></li>
|
||
</ul>
|
||
<p>Add an entry to the <a href="../conf-file/#conf-nix-path">Nix expression search path</a>.
|
||
This option may be given multiple times.
|
||
Paths added through <code>-I</code> take precedence over <a href="../env-common/#env-NIX_PATH"><code>NIX_PATH</code></a>.</p>
|
||
<ul>
|
||
<li><span id="opt-option"><a href="#opt-option"><code>--option</code></a></span> <em>name</em> <em>value</em></li>
|
||
</ul>
|
||
<p>Set the Lix configuration option <em>name</em> to <em>value</em>.
|
||
This overrides settings in the Lix configuration file (see nix.conf(5)).</p>
|
||
<ul>
|
||
<li><span id="opt-repair"><a href="#opt-repair"><code>--repair</code></a></span></li>
|
||
</ul>
|
||
<p>Fix corrupted or missing store paths by redownloading or rebuilding them.
|
||
Note that this is slow because it requires computing a cryptographic hash of the contents of every path in the closure of the build.
|
||
Also note the warning under <code>nix-store --repair-path</code>.</p>
|
||
<div class="admonition note">
|
||
<p class="admonition-title">Note</p>
|
||
<p>See <a href="../conf-file/#command-line-flags"><code>man nix.conf</code></a> for overriding configuration settings with command line flags.</p>
|
||
</div>
|
||
<h2 id="common-environment-variables">Common Environment Variables</h2>
|
||
<p>Most commands in Lix interpret the following environment variables:</p>
|
||
<ul>
|
||
<li>
|
||
<p><span id="env-IN_NIX_SHELL"><a href="#env-IN_NIX_SHELL"><code>IN_NIX_SHELL</code></a></span>
|
||
Indicator that tells if the current environment was set up by
|
||
<code>nix-shell</code>. It can have the values <code>pure</code> or <code>impure</code>.</p>
|
||
</li>
|
||
<li>
|
||
<p><span id="env-NIX_PATH"><a href="#env-NIX_PATH"><code>NIX_PATH</code></a></span>
|
||
A colon-separated list of directories used to look up the location of Nix
|
||
expressions using <a href="../../language/values/#type-path">paths</a>
|
||
enclosed in angle brackets (i.e., <code><path></code>),
|
||
e.g. <code>/home/eelco/Dev:/etc/nixos</code>. It can be extended using the
|
||
<a href="../opt-common/#opt-I"><code>-I</code> option</a>.</p>
|
||
<p>If <code>NIX_PATH</code> is not set at all, Lix will fall back to the following list in <a href="../conf-file/#conf-pure-eval">impure</a> and <a href="../conf-file/#conf-restrict-eval">unrestricted</a> evaluation mode:</p>
|
||
<ol>
|
||
<li><code>$HOME/.nix-defexpr/channels</code></li>
|
||
<li><code>nixpkgs=/nix/var/nix/profiles/per-user/root/channels/nixpkgs</code></li>
|
||
<li><code>/nix/var/nix/profiles/per-user/root/channels</code></li>
|
||
</ol>
|
||
<p>If <code>NIX_PATH</code> is set to an empty string, resolving search paths will always fail.
|
||
For example, attempting to use <code><nixpkgs></code> will produce:</p>
|
||
<div class="highlight"><pre><span></span><code>error: file 'nixpkgs' was not found in the Nix search path
|
||
</code></pre></div>
|
||
</li>
|
||
<li>
|
||
<p><span id="env-NIX_IGNORE_SYMLINK_STORE"><a href="#env-NIX_IGNORE_SYMLINK_STORE"><code>NIX_IGNORE_SYMLINK_STORE</code></a></span>
|
||
Normally, the Nix store directory (typically <code>/nix/store</code>) is not
|
||
allowed to contain any symlink components. This is to prevent
|
||
“impure” builds. Builders sometimes “canonicalise” paths by
|
||
resolving all symlink components. Thus, builds on different machines
|
||
(with <code>/nix/store</code> resolving to different locations) could yield
|
||
different results. This is generally not a problem, except when
|
||
builds are deployed to machines where <code>/nix/store</code> resolves
|
||
differently. If you are sure that you’re not going to do that, you
|
||
can set <code>NIX_IGNORE_SYMLINK_STORE</code> to <code>1</code>.</p>
|
||
<p>Note that if you’re symlinking the Nix store so that you can put it
|
||
on another file system than the root file system, on Linux you’re
|
||
better off using <code>bind</code> mount points, e.g.,</p>
|
||
<div class="highlight"><pre><span></span><code><span class="gp">$ </span>mkdir<span class="w"> </span>/nix
|
||
<span class="gp">$ </span>mount<span class="w"> </span>-o<span class="w"> </span><span class="nb">bind</span><span class="w"> </span>/mnt/otherdisk/nix<span class="w"> </span>/nix
|
||
</code></pre></div>
|
||
<p>Consult the mount 8 manual page for details.</p>
|
||
</li>
|
||
<li>
|
||
<p><span id="env-NIX_STORE_DIR"><a href="#env-NIX_STORE_DIR"><code>NIX_STORE_DIR</code></a></span>
|
||
Overrides the location of the Nix store (default <code>prefix/store</code>).</p>
|
||
</li>
|
||
<li>
|
||
<p><span id="env-NIX_DATA_DIR"><a href="#env-NIX_DATA_DIR"><code>NIX_DATA_DIR</code></a></span>
|
||
Overrides the location of the Lix static data directory (default
|
||
<code>prefix/share</code>).</p>
|
||
</li>
|
||
<li>
|
||
<p><span id="env-NIX_LOG_DIR"><a href="#env-NIX_LOG_DIR"><code>NIX_LOG_DIR</code></a></span>
|
||
Overrides the location of the Lix log directory (default
|
||
<code>prefix/var/log/nix</code>).</p>
|
||
</li>
|
||
<li>
|
||
<p><span id="env-NIX_STATE_DIR"><a href="#env-NIX_STATE_DIR"><code>NIX_STATE_DIR</code></a></span>
|
||
Overrides the location of the Lix state directory (default
|
||
<code>prefix/var/nix</code>).</p>
|
||
</li>
|
||
<li>
|
||
<p><span id="env-NIX_CONF_DIR"><a href="#env-NIX_CONF_DIR"><code>NIX_CONF_DIR</code></a></span>
|
||
Overrides the location of the system Lix configuration directory
|
||
(default <code>prefix/etc/nix</code>).</p>
|
||
</li>
|
||
<li>
|
||
<p><span id="env-NIX_CONFIG"><a href="#env-NIX_CONFIG"><code>NIX_CONFIG</code></a></span>
|
||
Applies settings from Lix configuration from the environment.
|
||
The content is treated as if it was read from a Lix configuration file.
|
||
Settings are separated by the newline character.</p>
|
||
</li>
|
||
<li>
|
||
<p><span id="env-NIX_USER_CONF_FILES"><a href="#env-NIX_USER_CONF_FILES"><code>NIX_USER_CONF_FILES</code></a></span>
|
||
Overrides the location of the Lix user configuration files to load from.</p>
|
||
<p>The default are the locations according to the <a href="https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html">XDG Base Directory Specification</a>.
|
||
See the <a href="#xdg-base-directories">XDG Base Directories</a> sub-section for details.</p>
|
||
<p>The variable is treated as a list separated by the <code>:</code> token.</p>
|
||
</li>
|
||
<li>
|
||
<p><span id="env-TMPDIR"><a href="#env-TMPDIR"><code>TMPDIR</code></a></span>
|
||
Use the specified directory to store temporary files. In particular,
|
||
this includes temporary build directories; these can take up
|
||
substantial amounts of disk space. The default is <code>/tmp</code>.</p>
|
||
</li>
|
||
<li>
|
||
<p><span id="env-NIX_REMOTE"><a href="#env-NIX_REMOTE"><code>NIX_REMOTE</code></a></span>
|
||
This variable should be set to <code>daemon</code> if you want to use the Lix
|
||
daemon to execute Nix operations. This is necessary in <a href="../../installation/multi-user/">multi-user
|
||
Nix installations</a>. If the Lix
|
||
daemon's Unix socket is at some non-standard path, this variable
|
||
should be set to <code>unix://path/to/socket</code>. Otherwise, it should be
|
||
left unset.</p>
|
||
</li>
|
||
<li>
|
||
<p><span id="env-NIX_SHOW_STATS"><a href="#env-NIX_SHOW_STATS"><code>NIX_SHOW_STATS</code></a></span>
|
||
If set to <code>1</code>, Lix will print some evaluation statistics, such as
|
||
the number of values allocated.</p>
|
||
</li>
|
||
<li>
|
||
<p><span id="env-NIX_COUNT_CALLS"><a href="#env-NIX_COUNT_CALLS"><code>NIX_COUNT_CALLS</code></a></span>
|
||
If set to <code>1</code>, Lix will print how often functions were called during
|
||
Nix expression evaluation. This is useful for profiling your Nix
|
||
expressions.</p>
|
||
</li>
|
||
<li>
|
||
<p><span id="env-GC_INITIAL_HEAP_SIZE"><a href="#env-GC_INITIAL_HEAP_SIZE"><code>GC_INITIAL_HEAP_SIZE</code></a></span>
|
||
If Nix has been configured to use the Boehm garbage collector, this
|
||
variable sets the initial size of the heap in bytes. It defaults to
|
||
384 MiB. Setting it to a low value reduces memory consumption, but
|
||
will increase runtime due to the overhead of garbage collection.</p>
|
||
</li>
|
||
</ul>
|
||
<h3 id="xdg-base-directories">XDG Base Directories</h3>
|
||
<p>Lix follows the <a href="https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html">XDG Base Directory Specification</a>.</p>
|
||
<p>For backwards compatibility, commands in Lix will follow the standard only when [<code>use-xdg-base-directories</code>] is enabled.
|
||
<a href="../New-CLI/nix/">New Nix commands</a> (experimental) conform to the standard by default.</p>
|
||
<p>The following environment variables are used to determine locations of various state and configuration files:</p>
|
||
<ul>
|
||
<li><code>XDG_CONFIG_HOME</code> (default <code>~/.config</code>)</li>
|
||
<li><code>XDG_STATE_HOME</code> (default <code>~/.local/state</code>)</li>
|
||
<li><code>XDG_CACHE_HOME</code> (default <code>~/.cache</code>)</li>
|
||
</ul>
|
||
<h2 id="examples">Examples</h2>
|
||
<div class="highlight"><pre><span></span><code><span class="gp">$ </span>nix-build<span class="w"> </span><span class="s1">'<nixpkgs>'</span><span class="w"> </span>--attr<span class="w"> </span>firefox
|
||
<span class="go">store derivation is /nix/store/qybprl8sz2lc...-firefox-1.5.0.7.drv</span>
|
||
<span class="go">/nix/store/d18hyl92g30l...-firefox-1.5.0.7</span>
|
||
|
||
<span class="gp">$ </span>ls<span class="w"> </span>-l<span class="w"> </span>result
|
||
<span class="go">lrwxrwxrwx ... result -> /nix/store/d18hyl92g30l...-firefox-1.5.0.7</span>
|
||
|
||
<span class="gp">$ </span>ls<span class="w"> </span>./result/bin/
|
||
<span class="go">firefox firefox-config</span>
|
||
</code></pre></div>
|
||
<p>If a derivation has multiple outputs, <code>nix-build</code> will build the default
|
||
(first) output. You can also build all outputs:</p>
|
||
<div class="highlight"><pre><span></span><code><span class="gp">$ </span>nix-build<span class="w"> </span><span class="s1">'<nixpkgs>'</span><span class="w"> </span>--attr<span class="w"> </span>openssl.all
|
||
</code></pre></div>
|
||
<p>This will create a symlink for each output named <code>result-outputname</code>.
|
||
The suffix is omitted if the output name is <code>out</code>. So if <code>openssl</code> has
|
||
outputs <code>out</code>, <code>bin</code> and <code>man</code>, <code>nix-build</code> will create symlinks
|
||
<code>result</code>, <code>result-bin</code> and <code>result-man</code>. It’s also possible to build a
|
||
specific output:</p>
|
||
<div class="highlight"><pre><span></span><code><span class="gp">$ </span>nix-build<span class="w"> </span><span class="s1">'<nixpkgs>'</span><span class="w"> </span>--attr<span class="w"> </span>openssl.man
|
||
</code></pre></div>
|
||
<p>This will create a symlink <code>result-man</code>.</p>
|
||
<p>Build a Nix expression given on the command line:</p>
|
||
<div class="highlight"><pre><span></span><code><span class="gp">$ </span>nix-build<span class="w"> </span>--expr<span class="w"> </span><span class="s1">'with import <nixpkgs> { }; runCommand "foo" { } "echo bar > $out"'</span>
|
||
<span class="gp">$ </span>cat<span class="w"> </span>./result
|
||
<span class="go">bar</span>
|
||
</code></pre></div>
|
||
<p>Build the GNU Hello package from the latest revision of the master
|
||
branch of Nixpkgs:</p>
|
||
<div class="highlight"><pre><span></span><code><span class="gp">$ </span>nix-build<span class="w"> </span>https://github.com/NixOS/nixpkgs/archive/master.tar.gz<span class="w"> </span>--attr<span class="w"> </span>hello
|
||
</code></pre></div>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
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||
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</article>
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</div>
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</div>
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</footer>
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</div>
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<div class="md-dialog" data-md-component="dialog">
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<div class="md-dialog__inner md-typeset"></div>
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</div>
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<script id="__config" type="application/json">{"base": "../../..", "features": ["content.tooltips", "search.highlight", "navigation.tabs", "navigation.indexes", "navigation.prune"], "search": "../../../assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>
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<script src="../../../assets/javascripts/bundle.fe8b6f2b.min.js"></script>
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</body>
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