wip: server-factory + firewall refractor

modules/nix/build.nix

@@ -14,19 +14,19 @@
       ];
       description = "List of supported nix build features for this system";
     };
-    
+
     buildMachines = lib.mkOption {
       type = lib.types.listOf lib.types.attrs;
-      default = [];
+      default = [ ];
       description = "List of remote build machines configuration";
     };
-    
+
     cores = lib.mkOption {
       type = lib.types.nullOr lib.types.int;
       default = null;
       description = "Number of cores to use for builds (null = auto-detect)";
     };
-    
+
     maxJobs = lib.mkOption {
       type = lib.types.nullOr lib.types.int;
       default = null;
@@ -46,8 +46,7 @@
         max-jobs = config.my.nix.maxJobs;
       })
     ];
-    
-    nix.buildMachines = lib.mkIf (config.my.nix.buildMachines != []) 
-      config.my.nix.buildMachines;
+
+    nix.buildMachines = lib.mkIf (config.my.nix.buildMachines != [ ]) config.my.nix.buildMachines;
   };
-} 
+}