let moz_overlay = import (builtins.fetchTarball https://github.com/mozilla/nixpkgs-mozilla/archive/master.tar.gz); nixpkgs = import { overlays = [ moz_overlay ]; }; in with nixpkgs; stdenv.mkDerivation { name = "moz_overlay_shell"; buildInputs = [ #nixpkgs.latest.rustChannels.nightly.rust nixpkgs.latest.rustChannels.stable.rust openssl pkg-config rls cargo ]; }