these 3 derivations will be built:
  /nix/store/g7gmkc044g6ac421fbs1sk1kdr121ad0-start-postgres-server-test.drv
  /nix/store/8j460sgvwk9qlj74cayxzc4ca4740qs9-postgres-15-check-harness.drv
  /nix/store/908hmc12jb4xjjvays042v2cl3rgp8vs-run-check-harness-psql-15.drv