{
    pkgs ? import <nixpkgs> { 
        overlays = [ 
            (import (builtins.fetchTarball {
              # url = https://github.com/nix-community/neovim-nightly-overlay/archive/master.tar.gz;
              url = https://github.com/nix-community/neovim-nightly-overlay/archive/72ff8b1ca0331a8735c1eeaefb95c12dfe21d30a.tar.gz;
            }))
        ]; 
    }
} :
pkgs.mkShell {
    nativeBuildInputs = [ 
        pkgs.neovim-nightly 
        pkgs.bat 
        pkgs.wrk
        pkgs.python3
        pkgs.rustc 
        pkgs.cargo 
        pkgs.gcc 
        pkgs.rustfmt 
        pkgs.clippy
    ];

  buildInputs = [
    pkgs.go
    pkgs.gotools
    pkgs.gopls
    # pkgs.go-outline
    # pkgs.gocode
    # pkgs.gopkgs
    # pkgs.gocode-gomod
    # pkgs.godef
    pkgs.golint
  ];
}