these 2 derivations will be built:
  /nix/store/vjkashzlc25ll62sh61nx2ik5rln1384-nixos-test-driver-plpgsql_check.drv
  /nix/store/l8vf5qaic0w6b23q4xsay2k5fk6j5wrf-vm-test-run-plpgsql_check.drv