This package uses variables banned in some scopes. This may stop working in future versions of Portage. $ pkgcheck scan -k VariableScope dev-lang/scala dev-lang/scala VariableScope: version 2.12.4: variable 'EROOT' used in 'src_compile', line 161 VariableScope: version 2.12.10: variable 'EROOT' used in 'src_compile', line 144