these 3 derivations will be built:
  /nix/store/4giddgw3smb4w7y93qaagaiqaczjglhs-start-postgres-server-test.drv
  /nix/store/68bdybr9a3sr0p22vr0rx01qi3x0ii57-postgres-15-check-harness.drv
  /nix/store/h4f8p0mmalwpljxnvxj68akjsdhii5bb-run-check-harness-psql-15.drv