these 2 derivations will be built:
  /nix/store/6zcf0jw4mpl75z4k65m49780qhp1r3r9-nixos-test-driver-wrappers-regression-PSQL-1387.drv
  /nix/store/s87wc92zzz7h813lcwli0a7icpigvkfd-vm-test-run-wrappers-regression-PSQL-1387.drv