these 2 derivations will be built:
  /nix/store/dyv9gz8593ciifm96hcpfzf3izw9228d-nixos-test-driver-plpgsql_check.drv
  /nix/store/8qcygcvlza6krkq0pcx2f31ld9xm8yp1-vm-test-run-plpgsql_check.drv