init

nix/module.nix

@@ -0,0 +1,37 @@
+{ self, metadata, ... }:
+{
+  flake.nixosModules.default =
+    {
+      config,
+      lib,
+      pkgs,
+      ...
+    }:
+    let
+      cfg = config.programs.example;
+
+      inherit (lib)
+        mkEnableOption
+        mkOption
+        mkIf
+        ;
+
+      inherit (pkgs.stdenv.hostPlatform) system;
+
+    in
+    {
+      options.programs.example = {
+        enable = mkEnableOption metadata.package.name;
+
+        package = mkOption {
+          default = self.packages.${system}.default;
+          description = "Package to use";
+          type = lib.types.package;
+        };
+      };
+
+      config = mkIf cfg.enable {
+        environment.systemPackages = [ cfg.package ];
+      };
+    };
+}

nix/package.nix

@@ -0,0 +1,37 @@
+{ metadata, ... }:
+{
+  perSystem = { pkgs, lib, ... }: {
+    packages.default = (
+      pkgs.rustPlatform.buildRustPackage {
+        pname = metadata.package.name;
+        version = metadata.package.version;
+
+        src = lib.cleanSource ./..;
+
+        cargoLock.lockFile = ./../Cargo.lock;
+
+        # build deps
+        nativeBuildInputs = with pkgs; [
+          # cargo
+          # rustc
+          # already provided by buildRustPackage :p
+          pkg-config
+        ];
+
+        # runtime deps
+        buildInputs = with pkgs; [
+
+        ];
+
+        meta = {
+          description = metadata.package.description;
+          homepage = metadata.package.repository;
+          downloadPage = "https://example.com";
+          license = lib.licenses."${metadata.package.license}";
+          # platforms = lib.platforms.linux;
+          mainProgram = metadata.package.name;
+        };
+      }
+    );
+  };
+}

nix/shell.nix

@@ -0,0 +1,11 @@
+{
+  perSystem = { pkgs, config, ... }: {
+    devShells.default = pkgs.mkShell {
+      packages = with pkgs; [ ];
+
+      inputsFrom = [
+        (config.packages.default)
+      ];
+    };
+  };
+}