dev-lang/hy-0.16.0 fails to build with Python 3.7. Adding python3_7 to PYTHON_COMPAT fixes this.
Created attachment 580274 [details, diff] hy-0.16.0.ebuild.patch adding PYTHON_COMPAT+=python3_7
Created attachment 580310 [details] dev-lang/hy-0.17.0.ebuild adding PYTHON_COMPAT+=python3_7 Additionally, newer version dev-lang/hy-0.17.0.ebuild is included, adding PYTHON_COMPAT+=python3_7. Content is identical to dev-lang/hy-0.16.0.ebuild.
commit 7181a032552724d43ab8a35a982f95d00d3344cb Author: Craig Andrews <candrews@gentoo.org> AuthorDate: 2019-10-13 22:24:26 +0200 Commit: Craig Andrews <candrews@gentoo.org> CommitDate: 2019-11-03 14:58:31 +0100 dev-lang/hy: Python 3.7 compatibility Package-Manager: Portage-2.3.76, Repoman-2.3.17 Signed-off-by: Craig Andrews <candrews@gentoo.org> Closes: https://github.com/gentoo/gentoo/pull/13286 Signed-off-by: Craig Andrews <candrews@gentoo.org>