with (import (fetchTarball https://github.com/nixos/nixpkgs/archive/nixpkgs-unstable.tar.gz) {}); let google-font-downloader = writeShellScriptBin "google-font-downloader" '' echo "Attempting to fetch $1" ${nodejs}/bin/npx google-font-downloader -- $1 rm ./styles/typography.css echo "/* To regenerate this file, run $ google-font-downloader '$1' */" >> ./styles/typography.css echo "" >> ./styles/typography.css cat ./google-fonts-*.css >> ./styles/typography.css ''; in mkShell { buildInputs = [ deno google-font-downloader ]; }