Skype on Debian 8 x64: missing libGL.so.1

There is no skype for x64, so
dpkg --add-architecture i386
apt-get update
apt-get upgrade
Then, we got a new problem:
skype: error while loading shared libraries: libGL.so.1: cannot open shared object file: No such file or directory
Solution:
sudo ln -s /usr/lib/mesa-diverted/i386-linux-gnu/libGL.so.1 /usr/lib/i386-linux-gnu/