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<h1 id="uninstalling-lix">Uninstalling Lix</h1>
<div class="admonition warning">
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<p>FIXME(Lix): This section is outdated and commented out due to the Lix installer being replaced such that it has an actual uninstaller.</p>
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### Single User
If you have a [single-user installation](./installing-binary.md#single-user-installation) of Lix, uninstall it by running:
<div class="highlight"><pre><span></span><code><span class="gp">$ </span>rm<span class="w"> </span>-rf<span class="w"> </span>/nix
</code></pre></div>
### Multi User
Removing a [multi-user installation](./installing-binary.md#multi-user-installation) of Lix is more involved, and depends on the operating system.
#### Linux
If you are on Linux with systemd:
1. Remove the Nix daemon service:
<div class="highlight"><pre><span></span><code><span class="go">sudo systemctl stop nix-daemon.service</span>
<span class="go">sudo systemctl disable nix-daemon.socket nix-daemon.service</span>
<span class="go">sudo systemctl daemon-reload</span>
</code></pre></div>
Remove files created by Lix:
<div class="highlight"><pre><span></span><code><span class="go">sudo rm -rf /etc/nix /etc/profile.d/nix.sh /etc/tmpfiles.d/nix-daemon.conf /nix ~root/.nix-channels ~root/.nix-defexpr ~root/.nix-profile</span>
</code></pre></div>
Remove build users and their group:
<div class="highlight"><pre><span></span><code><span class="go">for i in $(seq 1 32); do</span>
<span class="go"> sudo userdel nixbld$i</span>
<span class="go">done</span>
<span class="go">sudo groupdel nixbld</span>
</code></pre></div>
There may also be references to Lix in
- `/etc/bash.bashrc`
- `/etc/bashrc`
- `/etc/profile`
- `/etc/zsh/zshrc`
- `/etc/zshrc`
which you may remove.
#### macOS
1. Edit `/etc/zshrc`, `/etc/bashrc`, and `/etc/bash.bashrc` to remove the lines sourcing `nix-daemon.sh`, which should look like this:
<div class="highlight"><pre><span></span><code><span class="c1">## Nix</span>
<span class="k">if</span><span class="w"> </span><span class="o">[</span><span class="w"> </span>-e<span class="w"> </span><span class="s1">&#39;/nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh&#39;</span><span class="w"> </span><span class="o">]</span><span class="p">;</span><span class="w"> </span><span class="k">then</span>
<span class="w"> </span>.<span class="w"> </span><span class="s1">&#39;/nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh&#39;</span>
<span class="k">fi</span>
<span class="c1">## End Nix</span>
</code></pre></div>
If these files haven't been altered since installing Nix you can simply put
the backups back in place:
<div class="highlight"><pre><span></span><code><span class="go">sudo mv /etc/zshrc.backup-before-nix /etc/zshrc</span>
<span class="go">sudo mv /etc/bashrc.backup-before-nix /etc/bashrc</span>
<span class="go">sudo mv /etc/bash.bashrc.backup-before-nix /etc/bash.bashrc</span>
</code></pre></div>
This will stop shells from sourcing the file and bringing everything you
installed using Nix in scope.
2. Stop and remove the Nix daemon services:
<div class="highlight"><pre><span></span><code><span class="go">sudo launchctl unload /Library/LaunchDaemons/org.nixos.nix-daemon.plist</span>
<span class="go">sudo rm /Library/LaunchDaemons/org.nixos.nix-daemon.plist</span>
<span class="go">sudo launchctl unload /Library/LaunchDaemons/org.nixos.darwin-store.plist</span>
<span class="go">sudo rm /Library/LaunchDaemons/org.nixos.darwin-store.plist</span>
</code></pre></div>
This stops the Nix daemon and prevents it from being started next time you
boot the system.
3. Remove the `nixbld` group and the `_nixbuildN` users:
<div class="highlight"><pre><span></span><code><span class="go">sudo dscl . -delete /Groups/nixbld</span>
<span class="go">for u in $(sudo dscl . -list /Users | grep _nixbld); do sudo dscl . -delete /Users/$u; done</span>
</code></pre></div>
This will remove all the build users that no longer serve a purpose.
4. Edit fstab using `sudo vifs` to remove the line mounting the Nix Store
volume on `/nix`, which looks like
`UUID=<uuid> /nix apfs rw,noauto,nobrowse,suid,owners` or
`LABEL=Nix040Store /nix apfs rw,nobrowse`. This will prevent automatic
mounting of the Nix Store volume.
5. Edit `/etc/synthetic.conf` to remove the `nix` line. If this is the only
line in the file you can remove it entirely, `sudo rm /etc/synthetic.conf`.
This will prevent the creation of the empty `/nix` directory to provide a
mountpoint for the Nix Store volume.
6. Remove the files Nix added to your system:
<div class="highlight"><pre><span></span><code><span class="go">sudo rm -rf /etc/nix /var/root/.nix-profile /var/root/.nix-defexpr /var/root/.nix-channels ~/.nix-profile ~/.nix-defexpr ~/.nix-channels</span>
</code></pre></div>
This gets rid of any data Nix may have created except for the store which is
removed next.
7. Remove the Nix Store volume:
<div class="highlight"><pre><span></span><code><span class="go">sudo diskutil apfs deleteVolume /nix</span>
</code></pre></div>
This will remove the Nix Store volume and everything that was added to the
store.
If the output indicates that the command couldn't remove the volume, you should
make sure you don't have an _unmounted_ Nix Store volume. Look for a
"Nix Store" volume in the output of the following command:
<div class="highlight"><pre><span></span><code><span class="go">diskutil list</span>
</code></pre></div>
If you _do_ see a "Nix Store" volume, delete it by re-running the diskutil
deleteVolume command, but replace `/nix` with the store volume's `diskXsY`
identifier.
!!! note
After you complete the steps here, you will still have an empty `/nix`
directory. This is an expected sign of a successful uninstall. The empty
`/nix` directory will disappear the next time you reboot.
You do not have to reboot to finish uninstalling Nix. The uninstall is
complete. macOS (Catalina+) directly controls root directories and its
read-only root will prevent you from manually deleting the empty `/nix`
mountpoint.
-->
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