The ebuild seems to be missing SRC_URI arrows to rename the distfile: cb230f01fb288a0b9f0fc437545b97d06c846bd3.tar.gz
commit d76c33479e3c73502d0c792a9e6a166bf3952c65 Author: David Seifert <soap@gentoo.org> Date: Fri Jun 2 19:28:02 2017 +0200 app-misc/grabcartoons: [QA] Use proper distfile name Bug: https://bugs.gentoo.org/show_bug.cgi?id=619888