these 2 derivations will be built:
  /nix/store/nrprp3i6hrz0xl6262bcn46psxhw1hzb-nixos-test-driver-wrappers-regression-PSQL-1387.drv
  /nix/store/1acjadxl6saqaqbhwkzrpf120af14241-vm-test-run-wrappers-regression-PSQL-1387.drv