this derivation will be built:
  /nix/store/vylfm08zd18gx7x2n1ki5r17m1nkgmwc-run-check-harness-psql-15-slim.drv
these 2 paths will be fetched (23.2 KiB download, 91.9 KiB unpacked):
  /nix/store/bnymknmrcl9flw7i1zggy9rh56y08y6z-postgres-15-check-harness
  /nix/store/dqr8rhwilxgwciqlmvyk8j451hm3pl14-start-postgres-server-test