these 2 derivations will be built:
  /nix/store/5p0jfpw3s2ggd5j9rpymv5b86k02z0pg-nixos-test-driver-plpgsql_check.drv
  /nix/store/dyddk5qw1zjiavwpvc4g3q72sshj78ks-vm-test-run-plpgsql_check.drv