these 2 derivations will be built:
  /nix/store/rsyaaazjagfxzf760ngwd29ljhwax578-nixos-test-driver-pg_hashids.drv
  /nix/store/9m6k1zs1k49bm7j88vc7kpzgrwkhrcs6-vm-test-run-pg_hashids.drv