Trying to use brew-nix - still to much broken

modules/darwin/home-manager.nix

@@ -9,6 +9,7 @@
 
 let
   user = "olaf";
+  casks = import ./casks.nix { inherit pkgs; };
   # Define the content of your file as a derivation
   myEmacsLauncher = pkgs.writeScript "emacs-launcher.command" ''
     #!/bin/sh
@@ -32,49 +33,11 @@ in
   };
 
   homebrew = {
-    enable = true;
-    
-    casks = pkgs.callPackage ./casks.nix { };
-    onActivation = {
-      cleanup = "uninstall";
-      autoUpdate = true;
-      upgrade = true;
-    };
-
-    # These app IDs are from using the mas CLI app
-    # mas = mac app store
-    # https://github.com/mas-cli/mas
-    #
-    # $ nix shell nixpkgs#mas
-    # $ mas search <app name>
-    #
-    # If you have previously added these apps to your Mac App Store profile (but not installed them on this system),
-    # you may receive an error message "Redownload Unavailable with This Apple ID".
-    # This message is safe to ignore. (https://github.com/dustinlyons/nixos-config/issues/83)
-
-    masApps = {
-      "1Password for Safari" = 1569813296; # (8.10.82)
-      "Affinity Designer 2" = 1616831348;
-      "Affinity Photo 2: Image Editor" = 1616822987;
-      "Affinity Publisher 2" = 1606941598;
-      # "DaisyDisk" = 411643860; # (4.32)  # Don't use this, we need the official version that is not sandboxed
-      "Fantastical - Calendar" = 975937182;
-      " Fedistar" =  6445863996; # (1.13.1)
-      "Home Assistant" = 1099568401; # (2025.7.1)
-      "Ice Cubes for Mastodon" = 6444915884; # (1.11.3)
-      "LibreOffice" = 1630474372;
-      "Monal - XMPP Chatting " = 1637078500;
-      "MQTT Explorer" = 1455214828; # (0.3.5)
-      "Night Sky" = 475772902; # 475772902
-      "Native SQLite Manager" = 1416282836; # (1.31.0)
-      "Remarkable Desktop" = 1276493162; # (3.19.0)
-      "Slack for Desktop" = 803453959; # (4.45.60)
-      "WiFi Explorer: Scanner" = 494803304; # (3.5.6)
-      "Wireguard" = 1451685025; # (1.0.16)
-      ###      "1Password: Password Manager" = 1511601750; # (8.11.0) Does not seem to insta
-    };
+    enable = false;
   };
 
+  environment.systemPackages = casks;
+
   # Enable home-manager
   home-manager = {
     useGlobalPkgs = true;