Allow unfree packages with "run" and "shell" commands

homes/julian/features/fish/default.nix

@@ -43,14 +43,14 @@ with lib; {
         cd $argv
       '';
       run = ''
-        nix run nixpkgs#"$argv[1]" -- $argv[2..-1]
+        nix run --impure nixpkgs#"$argv[1]" -- $argv[2..-1]
       '';
       shell = ''
         set args
         for arg in $argv
             set args $args nixpkgs#$arg
         end
-        nix shell $args
+        nix shell --impure $args
       '';
       fish_user_key_bindings = ''
         bind ctrl-space 'zi; commandline -f repaint'

homes/julian/global/default.nix

@@ -24,6 +24,11 @@
     };
   };
 
+  # To allow unfree with 'nix run'
+  xdg.configFile."nixpkgs/config.nix".text = ''
+    { allowUnfree = true; }
+  '';
+
   colorscheme.name = "catppuccin-mocha";
 
   # systemd.user.startServices = "sd-switch"; # TODO: what is this