The ebuild seems to be missing SRC_URI arrows to rename the distfile: 2.1.00.txt
commit d12d8da3a8519e604db3c4d0f293ff3358f89373 Author: David Seifert <soap@gentoo.org> Date: Fri Jun 2 19:14:18 2017 +0200 net-misc/ttytter: [QA] Use proper distfile name Bug: https://bugs.gentoo.org/show_bug.cgi?id=619854