these 3 derivations will be built:
  /nix/store/w1c8c2cckcl6n4kqcsbxa1jjmvmziysg-start-postgres-server-test.drv
  /nix/store/pgdpykaxwv2wzlvf1vl12vkk8ydxylan-postgres-15-check-harness.drv
  /nix/store/g74cw6c8n9c8x5g9qygydqndab17akd1-run-check-harness-psql-15.drv