emerge: there are no ebuilds to satisfy ">=sys-apps/pkgcore-0.9.5[python_targets_python3_10(-)?,python_targets_python3_7(-)?,python_targets_python3_9(-)?,python_targets_python3_8(-)?,python_targets_python2_7(-)?,-python_single_target_python3_10(-),-python_single_target_python3_7(-),-python_single_target_python3_9(-),-python_single_target_python3_8(-),-python_single_target_python2_7(-)]".