!!! resolution failed
!!! request ( ( ('repo.livefs',) EqualityMatch: =False || ( ('category',) == virtual && ('package_is_real',) EqualityMatch: =False ) ) && =dev-ruby/psych-5.3.1 ), mode none
!!! trying dev-ruby/psych-5.3.1
!!!   failed due to failed inserting: [<PackageWrapper pkg=<<class 'pkgcore.ebuild.ebuild_src.package'> cpv='dev-ruby/psych-5.4.0' @0x10d027a10> wrapped='use' @0x10d5993d0>]

Failures encountered:
!!! failed '( ( ('repo.livefs',) EqualityMatch: =False || ( ('category',) == virtual && ('package_is_real',) EqualityMatch: =False ) ) && =dev-ruby/psych-5.3.1 )'
potentials:
repo gentoo: [ ebuild src: dev-ruby/psych-5.3.1 ]