You shouldn't need these, but if you're deciding you want to stay on
~arch _and_ not upgrade to 5.26, you will.
# Andreas K. Hüttel <dilfridge@gentoo.org> (5 June 2017)
# Masked for initial testing.
-# The following masks are technically not part of the Perl 5.26 block,
-# but with the unmasking of Perl 5.26 they become obsolete and can be
-# removed:
-#
->=perl-core/ExtUtils-MakeMaker-7.180.0
->=perl-core/Math-BigInt-1.999.726
>=dev-perl/Math-BigInt-GMP-1.600.0
=perl-core/Test-Simple-1.302.96
=virtual/perl-Test-Simple-1.302.96