these 3 derivations will be built:
  /nix/store/rjjyz94x6n5dpzwq6jswx3kra4j5jj4h-source.drv
  /nix/store/sd8bjcmvr695pch9p1xajcxcswv5fgvj-deja-vu-0.23.4.drv
  /nix/store/qgazjs1mdbq6bsx5qw2qhpkqkgdlx5cd-check-deja-vu.drv