nix build fails referncing go vendor

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1750400657,
+        "narHash": "sha256-3vkjFnxCOP6vm5Pm13wC/Zy6/VYgei/I/2DWgW4RFeA=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "b2485d56967598da068b5a6946dadda8bfcbcd37",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-25.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,59 @@
+{
+  description = "An api to check when the ArmA reforger Dedicated Server needs updated";
+
+  # Nixpkgs / NixOS version to use.
+  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-25.05";
+
+  outputs =
+    { self, nixpkgs }:
+    let
+      # System types to support.
+      supportedSystems = [
+        "x86_64-linux"
+      ];
+
+      # Helper function to generate an attrset '{ x86_64-linux = f "x86_64-linux"; ... }'.
+      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+
+      # Nixpkgs instantiated for supported system types.
+      nixpkgsFor = forAllSystems (system: import nixpkgs { inherit system; });
+
+    in
+    {
+
+      # Provide some binary packages for selected system types by mapping over each system architecture.
+      packages = forAllSystems (
+        system:
+        let
+	  # Set pkgs = the correct version for a given architecture.
+          pkgs = nixpkgsFor.${system};
+        in
+        {
+          reforger-update-api = pkgs.callPackage ./package.nix { };
+        }
+      );
+
+      # Add dependencies that are only needed for development, this also allows for nix develop command to launch a devshell
+      devShells = forAllSystems (
+        system:
+        let
+          pkgs = nixpkgsFor.${system};
+        in
+        {
+          default = pkgs.mkShell {
+            buildInputs = with pkgs; [
+              go
+              gopls
+              gotools
+              go-tools
+            ];
+          };
+        }
+      );
+
+      # The default package for 'nix build'. This makes sense if the
+      # flake provides only one package or there is a clear "main"
+      # package.
+      defaultPackage = forAllSystems (system: self.packages.${system}.reforger-update-api);
+    };
+}

go.mod

@@ -1,4 +1,4 @@
-module armareforger_update_checker
+module reforger-update-api
 
 go 1.23.8
 

package.nix

@@ -0,0 +1,25 @@
+{ buildGoModule }:
+# This is the wrapping around mkderivation that abstracts away the standard boilerplate logic for building go packages.
+buildGoModule {
+  # The final built binary name.
+  pname = "reforger-update-api";
+  # The binary version | NEEDS TO BE IN STEP WITH GO MOD.
+  version = "1.0.0";
+  # In 'nix develop', we don't need a copy of the source tree
+  # in the Nix store.
+  src = builtins.path {
+    name = "source";
+    path = ./.;
+  };
+
+  # This hash locks the dependencies of this package. It is
+  # necessary because of how Go requires network access to resolve
+  # VCS.  See https://www.tweag.io/blog/2021-03-04-gomod2nix/ for
+  # details. Normally one can build with a fake hash and rely on native Go
+  # mechanisms to tell you what the hash should be or determine what
+  # it should be "out-of-band" with other tooling (eg. gomod2nix).
+  # To begin with it is recommended to set this, but one must
+  # remember to bump this hash when your dependencies change.
+  # vendorHash = pkgs.lib.fakeHash;
+  vendorHash = null;
+}