these 3 derivations will be built:
  /nix/store/02lhbkp78q7wl8i2p06wvagrpp7bp6yb-source.drv
  /nix/store/x2879zic8sw66dxy8k5f915s9v99rlrd-gno-2.8.1.drv
  /nix/store/frqy8xclbxak5py8mr91x6zsdzx6lssq-check-gno.drv