these 3 derivations will be built:
  /nix/store/kshvj07ady7vdnqhfn7fvlffskwfl5l0-start-postgres-server-test.drv
  /nix/store/a78wdl4yclm4anngbk5idiy5r3jww8l2-postgres-15-check-harness.drv
  /nix/store/mrjmn3m88j0mr1rqi3fax9y17ghl8jzp-run-check-harness-psql-15.drv