these 3 derivations will be built:
  /nix/store/kng32fd15znslpyi6nvljk07c0ycsshq-freebuff-linux-x64.tar.gz.drv
  /nix/store/mwp9dg97am3vamf49x1w0nnj0f66d6v4-freebuff-0.2.11.drv
  /nix/store/mdwmsgi81jkl7s77hldv7hm50swmyi2g-check-freebuff.drv