diff --git a/docs/nix/lib-reference.md b/docs/nix/lib-reference.md
index 1026667..612b4a8 100644
--- a/docs/nix/lib-reference.md
+++ b/docs/nix/lib-reference.md
@@ -2,7 +2,7 @@
 title: Nix built-in and lib functions
 description: An overview of the various functions available in Nix and Nixpkgs lib.
 published: true
-date: 2024-06-09T16:32:39.315Z
+date: 2024-06-29T14:32:32.688Z
 tags: nix, nixpkgs
 editor: markdown
 dateCreated: 2024-06-09T16:32:18.232Z
@@ -56,6 +56,15 @@ Debug functions are useful for debugging Nix expressions.
 Resources:
 * [Nixpkgs source](https://github.com/NixOS/nixpkgs/blob/master/lib/debug.nix)
 
+## Local Files (`lib.fileset`)
+
+A safer and more convenient interface for working with local files (compared to nix's built-in functionality).
+
+Resources:
+* [Nixpkgs source](https://github.com/NixOS/nixpkgs/tree/master/lib/fileset)
+* [Nixpkgs manual](https://nixos.org/manual/nixpkgs/stable/#sec-functions-library-fileset)
+* [nix.dev Tutorial](https://nix.dev/tutorials/working-with-local-files)
+
 ## Generator functions (`lib.generators`)
 
 Generators can create various file formats from Nix data structures. They all use a similar interface: `generator { config-attrs } data`. `config-attrs` are used to overwrite the generator's default attributes.