added error

ubuntu.nix

@@ -4,5 +4,9 @@
 , pkgs
 ,...}: 
 {
-  home.packages = with pkgs; [clojure jq];
+  home.packages = with pkgs; 
+  [clojure 
+  jq
+  # import ./custom/zig.nix  << this does not work.
+  ];
 }