app-shells/thefuck works without any problem on an x86 system here, so I suggest to keywords it ~x86.
commit 5c9d10a793c670dd5808bff87d72cd018cfaf9ab Author: Manuel Rüger <mrueg@gentoo.org> Date: Sat Jul 9 15:53:27 2016 +0200 app-shells/thefuck: Keyword ~x86 Gentoo-Bug: #577556 Package-Manager: portage-2.3.0