these 2 derivations will be built:
  /nix/store/b9g6f9rzi9mfdbv7nyw13rdjh7hfg6v3-postgres-15-check-harness.drv
  /nix/store/389n4q83np8iyzgxf2039zzsiz3yrhny-run-check-harness-psql-15.drv