{ pkgs ? import { 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 ]; }