these 2 derivations will be built:
  /nix/store/3nrgwn5sx9dp3glr6s4b5wnf20mrpl2l-nixos-test-driver-wrappers-regression-PSQL-1387.drv
  /nix/store/1dhv7zn3pm5najrn7mpxp9shg92m43d4-vm-test-run-wrappers-regression-PSQL-1387.drv