these 3 derivations will be built:
  /nix/store/gi4mxki6vbv4yywx8047g2ihd9x1wk8n-source.drv
  /nix/store/45fhbl1nxfzlfayfa2g79rgz64a8gc6i-horae-checks-deps-0.1.0.drv
  /nix/store/sh7n2psfaj9pnbxm0a2ia9ad3gzh79dq-horae-clippy-0.1.0.drv