Find out what package /usr/lib64/liblzmadec.so belongs to and re-emerge that package. If you have ccache activated, delete the whole cache before doing this. If the problem is still present, at this point try revdep-rebuild -i
HTH
Find out what package /usr/lib64/liblzmadec.so belongs to and re-emerge that package. If you have ccache activated, delete the whole cache before doing this. If the problem is still present, at this point try revdep-rebuild -i
HTH