these 3 derivations will be built:
  /nix/store/zyb4ihgqvhdl197a6nl2abwd84qkcpi2-start-postgres-server-test.drv
  /nix/store/k5rsl5gwgic1i542zsik71735q12v7yw-postgres-15-check-harness.drv
  /nix/store/p83z0l42bl2fphvyrfr3vnwsrg5hf42w-run-check-harness-psql-15.drv