Sage can detect this as of https://trac.sagemath.org/ticket/28885 and it looks like the ebuild is all boilerplate.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=daa32852c893f9facda0caf23e27768dfcb8b06d commit daa32852c893f9facda0caf23e27768dfcb8b06d Author: Michael Orlitzky <mjo@gentoo.org> AuthorDate: 2020-01-30 21:19:49 +0000 Commit: Michael Orlitzky <mjo@gentoo.org> CommitDate: 2020-01-31 15:42:33 +0000 sci-mathematics/cliquer: new package of graph clique-finding routines. This is a straightforward import of the cliquer package from the sage-on-gentoo overlay, where it was maintained by François Bissey, with minor changes: * Update to EAPI=7. * Add the original cliquer homepage to HOMEPAGE. * Use the SageMath upstream tarball and drop autotools.eclass. Technically we are packaging Dima Pasechnik's "autocliquer" fork of cliquer, but the only difference between the two is an autotools build system that makes our lives oh so much easier. Closes: https://bugs.gentoo.org/707522 Package-Manager: Portage-2.3.84, Repoman-2.3.20 Signed-off-by: Michael Orlitzky <mjo@gentoo.org> sci-mathematics/cliquer/Manifest | 1 + sci-mathematics/cliquer/cliquer-1.21.ebuild | 29 +++++++++++++++++++++++++++++ sci-mathematics/cliquer/metadata.xml | 24 ++++++++++++++++++++++++ 3 files changed, 54 insertions(+)