nix: initial tooling setup

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: Ia510d6575a3796118a14dbc834af1ba16a6a6964

nix/package.nix

@@ -0,0 +1,29 @@
+{
+  lib,
+  rustPlatform,
+}:
+rustPlatform.buildRustPackage (finalAttrs: {
+  pname = "sample-rust";
+  version = "0.1.0";
+
+  src = let
+    fs = lib.fileset;
+    s = ../.;
+  in
+    fs.toSource {
+      root = s;
+      fileset = fs.unions [
+        (fs.fileFilter (file: builtins.any file.hasExt ["rs"]) (s + /src))
+        (s + /Cargo.lock)
+        (s + /Cargo.toml)
+      ];
+    };
+
+  cargoLock.lockFile = "${finalAttrs.src}/Cargo.lock";
+  enableParallelBuilding = true;
+
+  meta = {
+    description = "Sample Rust project";
+    maintainers = with lib.maintainers; [NotAShelf];
+  };
+})