these 3 derivations will be built:
  /nix/store/d7a7vbwfxxkifjs6gz0sa2cdhi6hxycb-start-postgres-server-test.drv
  /nix/store/1xkhpxpdas3dhjwg16prjijkyqdyxdz7-postgres-15-check-harness.drv
  /nix/store/n6jpwp1ahwkdf6am0ld7k2nhxdxz17rl-run-check-harness-psql-15.drv