Racket 6.11 was released just over a week ago (see https://download.racket-lang.org/). Copying the ebuild for racket 6.9 and rebuilding the manifest resulted in a working package for me. Changelog: https://download.racket-lang.org/v6.11.html
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=14ee5610276646c1ac9ec598f21b3268624c4586 commit 14ee5610276646c1ac9ec598f21b3268624c4586 Author: Amy Liffey <amynka@gentoo.org> AuthorDate: 2018-02-03 20:25:01 +0000 Commit: Amy Liffey <amynka@gentoo.org> CommitDate: 2018-02-03 20:26:22 +0000 dev-scheme/racket: version bump 6.11 Submitted-by: Ilya Mochalov <chrootsu@gmail.com> Closes: https://bugs.gentoo.org/636776 Closes: https://github.com/gentoo/gentoo/pull/6709 Package-Manager: Portage-2.3.13, Repoman-2.3.3 dev-scheme/racket/Manifest | 2 + dev-scheme/racket/racket-6.11.ebuild | 88 ++++++++++++++++++++++++++++++++++++ 2 files changed, 90 insertions(+)