these 3 derivations will be built:
  /nix/store/9pwc6lbfc579kpdff7l05hidich1j1qw-start-postgres-server-test.drv
  /nix/store/6167vmqr3za6vqrf5ihhgdmyn5g2l51g-postgres-15-check-harness.drv
  /nix/store/0093gl65c91lgd6lcq3fxb5xwr0vnqxf-run-check-harness-psql-15-slim.drv