these 2 derivations will be built:
  /nix/store/z4kwib540azghcvahxg53jp8ywvz61w0-freebuff-linux-x64.tar.gz.drv
  /nix/store/1wcmysxs3ygggkkr6bjy627z3b53ps3j-freebuff-0.0.176.drv