Calculating dependencies... done!
[ebuild  N     ] virtual/perl-podlators-4.70.0::gentoo  0 KiB
[ebuild  N     ] virtual/perl-Carp-1.400.0::gentoo  0 KiB
[ebuild  N     ] virtual/perl-CPAN-Meta-Requirements-2.140.0::gentoo  0 KiB
[ebuild     UD ] dev-lang/perl-5.22.2:0/5.22::gentoo [5.24.0-r2:0/5.24::gentoo] USE="berkdb gdbm -debug -doc -ithreads" 13416 KiB
[ebuild  N     ] perl-core/CPAN-Meta-2.150.1::gentoo  USE="{-test}" 98 KiB
[ebuild     U  ] dev-perl/Module-Build-0.421.800::gentoo [0.421.600::gentoo] USE="{-test}" 299 KiB

Total: 6 packages (1 upgrade, 1 downgrade, 4 new), Size of downloads: 13812 KiB

!!! 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-5.24.0-r2:0/5.24::gentoo, installed) pulled in by
    dev-lang/perl:0/5.24=[-build(-)] required by (perl-core/File-Temp-0.230.400-r1:0/0::gentoo, installed)
                 ^^^^^^^^
    =dev-lang/perl-5.24* required by (virtual/perl-CPAN-Meta-Requirements-2.140.0:0/0::gentoo, ebuild scheduled for merge)
    ^              ^^^^^
    (and 11 more with the same problems)

  (dev-lang/perl-5.22.2:0/5.22::gentoo, ebuild scheduled for merge) pulled in by
    =dev-lang/perl-5.22* required by (virtual/perl-Perl-OSType-1.8.0:0/0::gentoo, installed)
    ^              ^^^^^
    (and 8 more with the same problem)