these 3 derivations will be built:
  /nix/store/azk915vab3fqiaz3cq0f6h2vbwgybdxx-start-postgres-server-test.drv
  /nix/store/mc6y11bvii3s51frc28m2dkpjm916mv3-postgres-15-check-harness.drv
  /nix/store/wa1j2afb1233nq0xpx8f186fr0m982jr-run-check-harness-psql-15-slim.drv