Hey, libxmlb has this check: python_check_deps() { python_has_version -b "dev-python/setuptools[${PYTHON_USEDEP}]" } but setuptools is only a dependency with "introspection" use flag: BDEPEND=" ${PYTHON_DEPS} introspection? ( $(python_gen_any_dep 'dev-python/setuptools[${PYTHON_USEDEP}]') ) " causing a situation where setuptools may not be installed at all, but the ebuild still checks for it. * Checking whether python3_12 is suitable ... * dev-lang/python:3.12 ... [ ok ] * python_check_deps ... * dev-python/setuptools[python_targets_python3_12(-)] ... [ !! ] [ !! ] ... ... ... * No Python implementation found for the build. This is usually * a bug in the ebuild. Please report it to bugs.gentoo.org * along with the build log. * ERROR: dev-libs/libxmlb-0.3.14::gentoo failed (setup phase): * No supported Python implementation installed.