these 3 derivations will be built:
  /nix/store/0glmn42qxsaj3zpy2pg822ngvhdj67v5-freebuff-linux-x64.tar.gz.drv
  /nix/store/jbcc5dndwvfn83jydsb9v22ayvz1ys35-freebuff-0.0.198.drv
  /nix/store/hgi69w1hm5262x3d8zdam8bwyl0r93pf-check-freebuff.drv