these 2 derivations will be built:
  /nix/store/g268ic4h3bjvjx1d1b7zabnpdfqa9q3k-freebuff-linux-x64.tar.gz.drv
  /nix/store/zh1af04vpfim7swikjfwcd0vd19m9j1k-freebuff-0.0.163.drv