this derivation will be built:
  /nix/store/caq8pi0alyj7drxygaigakjmalhzqzb1-run-check-harness-psql-15.drv
these 2 paths will be fetched (23.2 KiB download, 91.9 KiB unpacked):
  /nix/store/gw9jy69m5xrxcppribv4is8kz3xgdlpd-postgres-15-check-harness
  /nix/store/9c3yv5nl6zzjw6mmnnl8n8vl07vf6ng5-start-postgres-server-test