these 3 derivations will be built:
  /nix/store/3bwgxdyj4vs6jkhjsrikvqsfm0hksqhq-source.drv
  /nix/store/3wzrx4nq918gwmvr5bm8jxwjzhg39vc7-horae-checks-deps-0.1.0.drv
  /nix/store/j8r4cfb4pgjqyh88m3m5raap1dij29hr-horae-clippy-0.1.0.drv