diff --git a/flake.nix b/flake.nix
index 1a7efce..ea1599e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -193,7 +193,6 @@
             wl-update-background
             ;
 
-
           # Installer ISO
           install-iso = inputs.nixos-generators.nixosGenerate {
             inherit system;
@@ -255,7 +254,7 @@
                 };
                 patches = [ ];
                 postPatch = ''
-                  sed -i 's/Broadlink/ZHA/' codes/1964.json
+                  sed 's/Broadlink/ZHA/' codes/1964.json > codes/50.json
                 '';
               });
           };