gentoo perl upgrade slot conflict
From thelinuxwiki
# emerge -uavND --quiet world
!!! Multiple package instances within a single package slot have been pulled !!! into the dependency graph, resulting in a slot conflict:
dev-lang/perl:0
(dev-lang/perl-5.26.9999:0/5.26::gentoo, ebuild scheduled for merge) pulled in by (no parents that aren't satisfied by other packages in this slot)
(dev-lang/perl-5.24.3:0/5.24::gentoo, ebuild scheduled for merge) pulled in by dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Authen-SASL-2.160.0-r1:0/0::gentoo, installed) ^^^^^^^^ (and 23 more with the same problem)