these 4 derivations will be built:
  /nix/store/gfax2gk09wa4s6yj9acvjh74qk5sxpix-herdr-core-0.1.21-vendor.drv
  /nix/store/w9q9my61p0hvahnj568q3slyxfahaxx6-herdr-core-0.1.21.drv
  /nix/store/90gs2bqh8gz6xisps1ppf0z8zsi8xgmd-herdr-app-0.1.15.drv
  /nix/store/asd72vz7aw01lqy5xcazy0f59qjcfnhv-check-herdr-app.drv