fix flake.lock

flake.lock

@@ -34,10 +34,31 @@
         "type": "github"
       }
     },
+    "pyproject-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1760402624,
+        "narHash": "sha256-jF6UKLs2uGc2rtved8Vrt58oTWjTQoAssuYs/0578Z4=",
+        "owner": "pyproject-nix",
+        "repo": "pyproject.nix",
+        "rev": "84c4ea102127c77058ea1ed7be7300261fafc7d2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "pyproject-nix",
+        "repo": "pyproject.nix",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "pyproject-nix": "pyproject-nix"
       }
     },
     "systems": {