$ emerge -pqv '=app-text/ronn-0.7.3-r3::text-kit'
 * ERROR: app-text/ronn-0.7.3-r3::text-kit failed (depend phase):
 *   ruby25: unknown Ruby implementation
 *
 * Call stack:
 *              ebuild.sh, line 594:  Called source '/var/git/meta-repo/kits/text-kit/app-text/ronn/ronn-0.7.3-r3.ebuild'
 *   ronn-0.7.3-r3.ebuild, line  10:  Called inherit 'ruby-fakegem'
 *              ebuild.sh, line 290:  Called __qa_source '/var/git/meta-repo/kits/core-kit/eclass/ruby-fakegem.eclass'
 *              ebuild.sh, line  79:  Called source '/var/git/meta-repo/kits/core-kit/eclass/ruby-fakegem.eclass'
 *    ruby-fakegem.eclass, line  15:  Called inherit 'ruby-ng'
 *              ebuild.sh, line 290:  Called __qa_source '/var/git/meta-repo/kits/core-kit/eclass/ruby-ng.eclass'
 *              ebuild.sh, line  79:  Called source '/var/git/meta-repo/kits/core-kit/eclass/ruby-ng.eclass'
 *         ruby-ng.eclass, line 291:  Called ruby_implementations_depend
 *         ruby-ng.eclass, line 282:  Called ruby_implementation_depend 'ruby25'
 *         ruby-ng.eclass, line 109:  Called _ruby_implementation_depend 'ruby25'
 *      ruby-utils.eclass, line  81:  Called die
 * The specific snippet of code:
 *   		*) die "$1: unknown Ruby implementation"
 *
 * If you need support, post the output of `emerge --info '=app-text/ronn-0.7.3-r3::text-kit'`,
 * the complete build log and the output of `emerge -pqv '=app-text/ronn-0.7.3-r3::text-kit'`.
 * Working directory: '/usr/lib64/python2.7/site-packages'
 * S: '/mnt/data/funtoo/portage-tmp/portage/app-text/ronn-0.7.3-r3/work'
 * ERROR: app-text/ronn-0.7.3-r3::text-kit failed (depend phase):
 *   ruby25: unknown Ruby implementation
 *
 * Call stack:
 *              ebuild.sh, line 594:  Called source '/var/git/meta-repo/kits/text-kit/app-text/ronn/ronn-0.7.3-r3.ebuild'
 *   ronn-0.7.3-r3.ebuild, line  10:  Called inherit 'ruby-fakegem'
 *              ebuild.sh, line 290:  Called __qa_source '/var/git/meta-repo/kits/core-kit/eclass/ruby-fakegem.eclass'
 *              ebuild.sh, line  79:  Called source '/var/git/meta-repo/kits/core-kit/eclass/ruby-fakegem.eclass'
 *    ruby-fakegem.eclass, line  15:  Called inherit 'ruby-ng'
 *              ebuild.sh, line 290:  Called __qa_source '/var/git/meta-repo/kits/core-kit/eclass/ruby-ng.eclass'
 *              ebuild.sh, line  79:  Called source '/var/git/meta-repo/kits/core-kit/eclass/ruby-ng.eclass'
 *         ruby-ng.eclass, line 291:  Called ruby_implementations_depend
 *         ruby-ng.eclass, line 282:  Called ruby_implementation_depend 'ruby25'
 *         ruby-ng.eclass, line 109:  Called _ruby_implementation_depend 'ruby25'
 *      ruby-utils.eclass, line  81:  Called die
 * The specific snippet of code:
 *   		*) die "$1: unknown Ruby implementation"
 *
 * If you need support, post the output of `emerge --info '=app-text/ronn-0.7.3-r3::text-kit'`,
 * the complete build log and the output of `emerge -pqv '=app-text/ronn-0.7.3-r3::text-kit'`.
 * Working directory: '/usr/lib64/python2.7/site-packages'
 * S: '/mnt/data/funtoo/portage-tmp/portage/app-text/ronn-0.7.3-r3/work'

!!! All ebuilds that could satisfy "=app-text/ronn-0.7.3-r3::text-kit" have been masked.
!!! One of the following masked packages is required to complete your request:
- app-text/ronn-0.7.3-r3::text-kit (masked by: corruption)

For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.