these 3 derivations will be built:
  /nix/store/6r4f2rknhms4bjw9lyxncvk8mjkia2zn-freebuff-linux-x64.tar.gz.drv
  /nix/store/a9ylg5xbmx9ql076kcs5fi2frf0i2jkh-freebuff-0.0.204.drv
  /nix/store/r81ajl0clvbr6jd73cr05bgq33smn0a5-check-freebuff.drv