pkgs/telegram-history-dump/default.nix

   1 { stdenv, ruby, fetchedGithub }:
   2 stdenv.mkDerivation (fetchedGithub ./telegram-history-dump.json // {
   3   installPhase = ''
   4     mkdir -p $out/lib $out/bin
   5     cp -a $src $out/lib/telegram-history-dump
   6     ln -s $out/lib/telegram-history-dump/telegram-history-dump.rb $out/bin/telegram-history-dump
   7     '';
   8   buildInputs = [ ruby ];
   9 })