Debian 9 fail on run any example
`Traceback (most recent call last):
  File "/home/user/Downloads/python/exemplo.py", line 3, in <module>
    pyxel.init(160, 120)
  File "/home/user/.local/lib/python3.5/site-packages/pyxel/__init__.py", line 27, in init
    border_width, border_color)
  File "/home/user/.local/lib/python3.5/site-packages/pyxel/app.py", line 79, in __init__
    self._renderer = Renderer(width, height)
  File "/home/user/.local/lib/python3.5/site-packages/pyxel/renderer.py", line 28, in __init__
    DRAWING_FRAGMENT_SHADER)
  File "/home/user/.local/lib/python3.5/site-packages/pyxel/glwrapper.py", line 12, in __init__
    shaders.compileShader(fragment_shader, gl.GL_FRAGMENT_SHADER))
  File "/home/user/.local/lib/python3.5/site-packages/OpenGL/GL/shaders.py", line 196, in compileProgram
    program.check_validate()
  File "/home/user/.local/lib/python3.5/site-packages/OpenGL/GL/shaders.py", line 108, in check_validate
    glGetProgramInfoLog( self ),
RuntimeError: Validation failure (0):
`
I'm try with Python 3.5.3 and Python 3.5.5 |Anaconda, Inc. (By anaconda install)