diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index 15e2d4a..dcdc812 100644
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -85,7 +85,7 @@
   };
 
   # PKG config
-    shellHook = ''
+    pkgs.mkShell.shellHook = ''
     export PKG_CONFIG_PATH=${pkgs.gtkmm4}/lib/pkgconfig:$PKG_CONFIG_PATH
   '';