these 3 derivations will be built:
  /nix/store/rmnbxaxyhfpz1wc65xljhz8m6d29v7yg-start-postgres-server-test.drv
  /nix/store/vm7d4k29pxyfs0h2m72y1hpf99nak03k-postgres-15-check-harness.drv
  /nix/store/h3k0436s3w4myc3hxbz40biavq1l462b-run-check-harness-psql-15.drv