initial rust-shell setup

shells/rust/default.nix

@@ -0,0 +1,24 @@
+{
+  # Snowfall Lib provides a customized `lib` instance with access to your flake's library
+  # as well as the libraries available from your flake's inputs.
+  lib,
+  # You also have access to your flake's inputs.
+  inputs,
+
+  # The namespace used for your flake, defaulting to "internal" if not set.
+  namespace,
+
+  # All other arguments come from NixPkgs. You can use `pkgs` to pull shells or helpers
+  # programmatically or you may add the named attributes as arguments here.
+  pkgs,
+  mkShell,
+  system,
+  ...
+}:
+
+mkShell {
+  # Create your shell
+  nativeBuildInputs = [ 
+    inputs.fenix.packages.${system}.complete.toolchain 
+  ];
+}