these 2 derivations will be built:
  /nix/store/n078dxz6ckp8lyp3jj68x4596gmaswn1-webkitgtk-2.38.3+abi=4.0.drv
  /nix/store/qfc1zjq6yj2495abnxvplcw91ifbpjr3-trillian-im-6.3.0.1.drv