fixup! home.server: enable hm gc when host is server

Author: Gerschtli

home/base/server.nix

@@ -10,14 +10,12 @@ in
 
   ###### interface
 
-  options = {
-
-  };
+  options = { };
 
 
   ###### implementation
 
-  config = mkIf nixosConfig.custom.base.server.enable {
+  config = mkIf (nixosConfig != null && nixosConfig.custom.base.server.enable) {
 
     # needed because of https://github.com/NixOS/nix/issues/8508
     nix.gc = mkIf (config.home.username != "root") {