these 3 derivations will be built:
  /nix/store/sh6l1hn5kyxyki0zhql0dpv5k5id6b7v-source.drv
  /nix/store/i5nyf6p025kn2305d09wggxmpvn6wpjw-deja-vu-0.24.2.drv
  /nix/store/2q04lh8rza596xf3am4dc8yyvnjj2jv0-check-deja-vu.drv