Fix missing reference to stapelberg

flake.lock

@@ -36,6 +36,27 @@
         "type": "github"
       }
     },
+    "nix-index-database": {
+      "inputs": {
+        "nixpkgs": [
+          "stapelberg",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1776829403,
+        "narHash": "sha256-oHVcvP2Ahhj1KUsEzp+2BQF55/r5VSa3QxdPdwE1p00=",
+        "owner": "nix-community",
+        "repo": "nix-index-database",
+        "rev": "c43246d4e9e506178b69baed075d797ec2d873e2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nix-index-database",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1772465433,
@@ -91,7 +112,29 @@
       "inputs": {
         "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs",
-        "proj": "proj"
+        "proj": "proj",
+        "stapelberg": "stapelberg"
+      }
+    },
+    "stapelberg": {
+      "inputs": {
+        "nix-index-database": "nix-index-database",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1778964329,
+        "narHash": "sha256-nlmdEzz+fkavzjDTJZBQKHJK3dqU2dubTDAAxezlZS4=",
+        "owner": "stapelberg",
+        "repo": "nix",
+        "rev": "40227cfc32322ce948f65cc24bc1fecfbe74c721",
+        "type": "github"
+      },
+      "original": {
+        "owner": "stapelberg",
+        "repo": "nix",
+        "type": "github"
       }
     },
     "systems": {

flake.nix

@@ -11,7 +11,7 @@
 		};
 	};
 
-	outputs = { self, nixpkgs, flake-utils, proj }:
+	outputs = { self, nixpkgs, flake-utils, proj, stapelberg }:
 		flake-utils.lib.eachDefaultSystem (system:
 			let
 				pkgs = import nixpkgs {