these 2 derivations will be built:
  /nix/store/3ri1044jk04miv7k0p6g0bwl3vakwmmm-nixos-test-driver-plpgsql_check.drv
  /nix/store/600y6q1yh541wkzx2vrc7a4ml7f3vfyf-vm-test-run-plpgsql_check.drv