drv/rust: initial version

derivations/dev/rust.nix

@@ -0,0 +1,19 @@
+{
+pkgs ? import /home/steveej/src/github/NixOS/nixpkgs {},
+name ? "generic",
+version,
+extraBuildInputs ? [] }: 
+let 
+  rustPackages = builtins.getAttr "rust${version}" pkgs;
+  rustBuildInputs = { rustPackages }: [
+      rustPackages.rustc
+  ];
+  rustShellHook = { rustPackages, name }: ''
+      setPS1 rust${version}
+      unset name
+    '';
+in pkgs.stdenv.mkDerivation {
+  inherit name;
+  buildInputs = extraBuildInputs ++ (rustBuildInputs){ inherit rustPackages; };
+  shellHook = (rustShellHook) { inherit name; inherit rustPackages; };
+}