Emerging @world ran into current stable aubio not supporting python 12. Reproducible: Always Actual Results: # emerge -av1 aubio * IMPORTANT: 2 news items need reading for repository 'gentoo'. * Use eselect news read to view new items. These are the packages that would be merged, in order: Calculating dependencies - !!! Problem resolving dependencies for media-libs/aubio ... done! Dependency resolution took 36.75 s (backtrack: 4/20). WARNING: One or more updates/rebuilds have been skipped due to a dependency conflict: dev-python/setuptools:0 (dev-python/setuptools-70.0.0:0/0::gentoo, ebuild scheduled for merge) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_12 (-pypy3) -python3_10 -python3_11 (-python3_13)" conflicts with dev-python/setuptools[python_targets_python3_11(-)] required by (dev-python/Opcodes-0.3.14-r1:0/0::gentoo, installed) USE="doc" ABI_X86="(64)" PYTHON_TARGETS="python3_11 -python3_10 -python3_12" dev-python/setuptools[python_targets_python3_11(-)] required by (dev-python/fs-2.4.16:0/0::gentoo, installed) USE="doc -test" ABI_X86="(64)" PYTHON_TARGETS="python3_11 (-pypy3) -python3_10 -python3_12" >=dev-python/setuptools-62.4[python_targets_python3_11(-)] required by (dev-python/setuptools-rust-1.9.0:0/0::gentoo, installed) USE="-debug -test" ABI_X86="(64)" PYTHON_TARGETS="python3_11 (-pypy3) -python3_10 -python3_12" dev-python/setuptools[python_targets_python3_11(-)] required by (dev-python/sip-6.8.3:5/5::gentoo, installed) USE="doc -test" ABI_X86="(64)" PYTHON_TARGETS="python3_11 -python3_10 -python3_12" dev-python/setuptools[python_targets_python3_11(-)] required by (dev-python/cffi-1.16.0:0/1.16.0::gentoo, installed) USE="-debug -doc -test" ABI_X86="(64)" PYTHON_TARGETS="python3_11 -python3_10 -python3_12" >=dev-python/setuptools-60.5.0[python_targets_python3_11(-)] required by (dev-python/pbr-6.0.0:0/0::gentoo, installed) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_11 (-pypy3) -python3_10 -python3_12" dev-python/setuptools[python_targets_python3_11(-)] required by (dev-python/setuptools-scm-8.0.4:0/0::gentoo, installed) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python3_11 (-pypy3) -python3_10 -python3_12" >=dev-python/setuptools-39.2.0[python_targets_python3_11(-)] required by (dev-python/pip-24.0:0/0::gentoo, installed) USE="(test-rust) -test" ABI_X86="(64)" PYTHON_TARGETS="python3_11 (-pypy3) -python3_10 -python3_12 (-python3_13)" !!! The following update(s) have been skipped due to unsatisfied dependencies !!! triggered by backtracking: media-libs/aubio:0 !!! The ebuild selected to satisfy "aubio" has unmet requirements. - media-libs/aubio-0.4.9-r2::gentoo USE="ffmpeg sndfile -doc -double-precision -examples -fftw -jack -libsamplerate -python -test" ABI_X86="(64)" PYTHON_TARGETS="-python3_10 -python3_11" The following REQUIRED_USE flag constraints are unsatisfied: any-of ( python_targets_python3_10 python_targets_python3_11 ) The above constraints are a subset of the following complete expression: any-of ( python_targets_python3_10 python_targets_python3_11 ) at-most-one-of ( double-precision libsamplerate ) doc? ( python )