only cross compile when necessary

flake.lock

@@ -7,11 +7,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1771267058,
-        "narHash": "sha256-EEL4SmD1b3BPJPsSJJ4wDTXWMumJqbR+BLzhJJG0skE=",
+        "lastModified": 1770133120,
+        "narHash": "sha256-RuAWONXb+U3omSsuIPCrPcgj0XYqv+2djG0cnPGEyKg=",
         "ref": "main",
-        "rev": "e3962d02c78b9c7b4d18148d931a9a4bf22e7902",
-        "revCount": 254,
+        "rev": "3123b8b474319bc75ee780e0357dcdea69dc85e6",
+        "revCount": 244,
         "type": "git",
         "url": "https://git.pvv.ntnu.no/Projects/dibbler.git"
       },

flake.nix

@@ -106,20 +106,20 @@
             }:
             let
               commonPkgsConfig = {
-                inherit localSystem crossSystem;
-                config.allowUnfreePredicate =
-                  pkg:
-                  builtins.elem (lib.getName pkg) [
+                config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg)
+                  [
                     "nvidia-x11"
                     "nvidia-settings"
                   ];
-                overlays =
-                  (lib.optionals enableDefaults [
-                    # Global overlays go here
-                    inputs.roowho2.overlays.default
-                  ])
-                  ++ overlays;
-              };
+                overlays = (lib.optionals enableDefaults [
+                  # Global overlays go here
+                  inputs.roowho2.overlays.default
+                ]) ++ overlays;
+              } // (if localSystem != crossSystem then {
+                inherit localSystem crossSystem;
+              } else {
+                system = crossSystem;
+              });
 
               pkgs = import nixpkgs commonPkgsConfig;
               unstablePkgs = import nixpkgs-unstable commonPkgsConfig;