$ emerge -pvt --autounmask solfege These are the packages that would be merged, in reverse order: Calculating dependencies... done! The following keyword changes are necessary to proceed: (see "package.accept_keywords" in the portage(5) man page for more details) # required by solfege (argument) =media-sound/solfege-3.23.4 ~amd64 !!! The ebuild selected to satisfy "dev-python/pyalsa" has unmet requirements. - dev-python/pyalsa-1.1.6::gentoo USE="" ABI_X86="(64)" PYTHON_TARGETS="-python2_7 -python3_6" The following REQUIRED_USE flag constraints are unsatisfied: any-of ( python_targets_python2_7 python_targets_python3_6 ) (dependency required by "media-sound/solfege-3.23.4::gentoo[alsa]" [ebuild]) (dependency required by "solfege" [argument])
Fixed in commit 04480f9a25f44d738dff0e927ba8a09a7bde9d59