diff --git a/modules/unfree.nix b/modules/unfree.nix
index 5df5fa1..bc65352 100644
--- a/modules/unfree.nix
+++ b/modules/unfree.nix
@@ -4,6 +4,7 @@
 # See also: ./base.nix for unfree firmware.
 
 # This file adds the ability to whitelist unfree packages in different .nix config files.
+# See https://github.com/NixOS/nixpkgs/issues/55674#issuecomment-1220216445 for why this is necessary.
 # Example: Instead of
 #   nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
 #     "obsidian"
@@ -11,6 +12,13 @@
 # add the following
 #   allowUnfree = [ "obsidian" ];
 
+# Source:
+# https://discourse.nixos.org/t/use-nixpkgs-config-allowunfreepredicate-in-multiple-nix-file/36590/2
+# -> Implementation: https://codeberg.org/AndrewKvalheim/configuration/src/commit/11794e595144500a6c2be706e42ed698b1788bb8/packages/nixpkgs-issue-55674.nix
+# -> Example: https://codeberg.org/AndrewKvalheim/configuration/src/commit/11794e595144500a6c2be706e42ed698b1788bb8/common/components/printer.system.nix#L7
+
+# TODO: Once https://github.com/NixOS/nixpkgs/issues/55674 is merged, this is obsolete.
+
 let
   inherit (builtins) elem;
   inherit (lib) getName mkOption;