{ pkgs ? import <nixpkgs> {},
  crane ? builtins.getFlake "github:ipetkov/crane",
  fenix ? builtins.getFlake "github:nix-community/fenix",
  fenixToolchain ? "default"
}:
let
  fenixPkgs = fenix.packages.${pkgs.system};
  toolchain = fenixPkgs.${fenixToolchain}.toolchain;
  craneLib = (crane.mkLib pkgs).overrideToolchain toolchain;
in craneLib.devShell {
  packages = [ fenixPkgs.rust-analyzer ];
}