these 2 derivations will be built:
  /nix/store/is8n2gwf8wblc4cc1idw6mmy123pqjhp-freebuff-linux-x64.tar.gz.drv
  /nix/store/h58b37c6xz9h6jld03rvirhndgxpk3zy-freebuff-0.0.158.drv