fix(systems/mottarone): the horrors.

alternatively, rollback nixpkgs to before the latest staging merge.
something (gtk3 or something depending on it) broke jaspersoft studio
and well i need that to work

flake.lock

@@ -227,9 +227,26 @@
         "type": "github"
       },
       "original": {
-        "id": "nixpkgs",
+        "owner": "NixOS",
         "ref": "nixos-unstable",
-        "type": "indirect"
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-mottarone": {
+      "locked": {
+        "lastModified": 1739866667,
+        "narHash": "sha256-EO1ygNKZlsAC9avfcwHkKGMsmipUk1Uc0TbrEZpkn64=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "73cf49b8ad837ade2de76f87eb53fc85ed5d4680",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "73cf49b8ad837ade2de76f87eb53fc85ed5d4680",
+        "type": "github"
       }
     },
     "root": {
@@ -245,6 +262,7 @@
         "mystia": "mystia",
         "nixos-wsl": "nixos-wsl",
         "nixpkgs": "nixpkgs",
+        "nixpkgs-mottarone": "nixpkgs-mottarone",
         "systems": "systems",
         "treefmt-nix": "treefmt-nix",
         "ukubot-rs": "ukubot-rs"