Specified Rust version in Cargo.toml nix shell and builder

Cargo.toml

@@ -6,6 +6,7 @@ description = "A W.I.P. bevy-engine game "
 authors = ["Johannes Hendrik Gerard van der Weide"]
 version = "0.1.0"
 edition = "2021"
+rust-version = "1.70"
 license-file = "LICENSE"
 readme = "README.md"
 

flake.nix

@@ -41,5 +41,9 @@
       devShells = forAllSystems ({ pkgs }: {
         default = import ./nix/shell.nix { inherit pkgs; };
       });
+      # Builder
+      packages = forAllSystems ({ pkgs }: {
+        default = import ./nix/default.nix { inherit pkgs; }; 
+      });
     };
 }

nix/default.nix

@@ -0,0 +1,43 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+pkgs.rustPlatform.buildRustPackage {
+  pname = "hertog-game";
+  version = "0.1.0";
+
+  src = ../.;
+
+  cargoLock = {
+    lockFile = ../Cargo.lock;
+  };
+
+  nativeBuildInputs = with pkgs; [
+    rust-bin.stable."1.70.0".default
+    makeWrapper
+    pkg-config
+  ] ++ lib.optionals stdenv.isLinux [
+    vulkan-loader
+  ];
+
+  buildInputs = with pkgs; [
+  ] ++ lib.optionals stdenv.isLinux [
+    alsa-lib
+    libxkbcommon
+    udev
+    vulkan-loader
+    wayland
+    xorg.libX11
+    xorg.libXcursor
+    xorg.libXi
+    xorg.libXrandr
+  ] ++ lib.optionals stdenv.isDarwin [
+    darwin.apple_sdk_11_0.frameworks.Cocoa
+    rustPlatform.bindgenHook
+  ];
+
+  postInstall = ''
+    mkdir $out/bin/assets
+    mkdir $out/bin/data
+    cp -r assets $out/bin/
+    cp -r data $out/bin/
+  '';
+}

nix/shell.nix

@@ -2,6 +2,7 @@
    pkgs.mkShell {
       # The Nix packages provided in the environment
       packages = (with pkgs; [
+         rust-bin.stable."1.70.0".default
          # Fluff
          cargo-mommy
          onefetch