these 2 derivations will be built:
  /nix/store/6dn2qs9kgpf9acp85clasxgbak03dbk3-herdr-eternal-deps-0.1.0.drv
  /nix/store/pir4shd006nqk13mlnp5cvifp8sx269v-herdr-eternal-test-0.1.0.drv