ImportError: libpng12.so.0: cannot open shared object file: No such file or directory

Created by: 183amir

I am having a very strange error when building bob.io.audio:

import: 'bob.io.audio'
Traceback (most recent call last):
  File "/home/amir/miniconda3/conda-bld/test-tmp_dir/run_test.py", line 31, in <module>
    import bob.io.audio
  File "/home/amir/miniconda3/envs/_test/lib/python3.5/site-packages/bob.io.audio-2.0.0-py3.5-linux-x86_64.egg/bob/io/audio/__init__.py", line 4, in <module>
    from ._library import *
ImportError: libpng12.so.0: cannot open shared object file: No such file or directory

I have libpng16.so.0 installed but why is it trying to import libpng? Here is the full log: log.txt