these 2 derivations will be built:
  /nix/store/9i6qn14wg944yljrfc71z26xygs2x2wd-nixos-test-driver-wrappers-regression-PSQL-1387.drv
  /nix/store/hmqqdxrns3bljmq43gl5w24iw571mlh8-vm-test-run-wrappers-regression-PSQL-1387.drv