these 2 derivations will be built:
  /nix/store/14cmfx81vf69rmkwsl8fnnqsxppxscgi-postgres-15-check-harness.drv
  /nix/store/hwd4h31lwh8agczp5sxg2ari3902rzqy-run-check-harness-psql-15-slim.drv