these 2 derivations will be built:
  /nix/store/b7v9wa71r7yxlk8sjcqa5r29f1w1fjcb-nixos-test-driver-wrappers-regression-PSQL-1387.drv
  /nix/store/34sfmr6rih2qyayf82iss4gc9l3yyphh-vm-test-run-wrappers-regression-PSQL-1387.drv