these 3 derivations will be built:
  /nix/store/im1620z2cy25l78bqjbg6k2p1dc29hhc-start-postgres-server-test.drv
  /nix/store/0h3shsyh8gw2wmsz66r1k95ss7569i7a-postgres-15-check-harness.drv
  /nix/store/6nxm2c4cdfhl3r659lhpq14yr35r57qy-run-check-harness-psql-15-slim.drv