diff --git a/graphical-iso.nix b/graphical-iso.nix
index 6269c97..660caa4 100644
--- a/graphical-iso.nix
+++ b/graphical-iso.nix
@@ -1,3 +1,4 @@
+# from https://nixos.wiki/wiki/Creating_a_NixOS_live_CD
 { config, pkgs, ... }:
 {
   imports = [
diff --git a/minimal-iso.nix b/minimal-iso.nix
index f04ff54..a1c9686 100644
--- a/minimal-iso.nix
+++ b/minimal-iso.nix
@@ -1,3 +1,4 @@
+#from https://nixos.wiki/wiki/Creating_a_NixOS_live_CD
 { config, pkgs, ... }:
 {
   imports = [