$ sudo aptitude install libgl1-mesa-dri:i386
The following NEW packages will be installed:
  libdrm-amdgpu1:i386{a} libdrm-intel1:i386{a} libdrm-nouveau2:i386{a} libdrm-radeon1:i386{a} libdrm2:i386{a} libgl1-mesa-dri:i386{b} libllvm3.6v5:i386{ab}
0 packages upgraded, 7 newly installed, 0 to remove and 3 not upgraded.
Need to get 13,7 MB of archives. After unpacking 135 MB will be used.
The following packages have unmet dependencies:
 libgl1-mesa-dri : Breaks: libgl1-mesa-dri:i386 (!= 11.0.4~git20151026+11.0.ec14e6f8-0ubuntu0ricotz~vivid) but 11.0.2-1ubuntu4 is to be installed.
 libgl1-mesa-dri:i386 : Breaks: libgl1-mesa-dri (!= 11.0.2-1ubuntu4) but 11.0.4~git20151026+11.0.ec14e6f8-0ubuntu0ricotz~vivid is installed.
 libllvm3.6v5:i386 : Conflicts: libllvm3.6 but 1:3.6-2ubuntu1 is installed.
                     Conflicts: libllvm3.6:i386 but 1:3.6-2ubuntu1 is installed.
The following actions will resolve these dependencies:

     Keep the following packages at their current version:
1)     libgl1-mesa-dri:i386 [Not Installed]
2)     libllvm3.6v5:i386 [Not Installed]