these 3 derivations will be built:
  /nix/store/s9dk99298y4qc30c3b7l23y2yk3vlk56-start-postgres-server-test.drv
  /nix/store/08z7in5324apd82j6483g8f4ibbk26pz-postgres-15-check-harness.drv
  /nix/store/9hicx5wqpszbb67c1nbwpq4ivmhzwhv5-run-check-harness-psql-15.drv