these 2 derivations will be built:
  /nix/store/68d0g14f0s38hnyqjbq6p7kzrg9z7sv1-nixos-test-driver-pgroonga.drv
  /nix/store/g25c7zc8knlr1822jhdsz3lxqivicxri-vm-test-run-pgroonga.drv