diff --git a/derivations/firefox-gnome-theme/default.nix b/derivations/firefox-gnome-theme/default.nix
index 361db907..6c5ae7f9 100644
--- a/derivations/firefox-gnome-theme/default.nix
+++ b/derivations/firefox-gnome-theme/default.nix
@@ -1,5 +1,11 @@
 # Taken from https://github.com/tadfisher/flake/blob/main/pkgs/firefox-gnome-theme/default.nix
 
+# We don't use fetchTarbal or fetchFromGithub because we are using flakes:
+# - Specify the firefox-gnome-theme github repo as input in flake.nix
+# - We don't need to add sha256 or commit revision because it is automatically locked in flake.lock
+# - Pass the input to overlays/default.nix and from there to derivations/default.nix
+# - There we plug the input into the src argument of this derivation
+
 { lib, stdenv, src }:
 
 stdenv.mkDerivation {