Python for Android: Cython file compilation error

After git cloning python-for-android, I tried to build a distro:

./distribute.sh -m "kivy"

      

        
        
        
      

    

And got a few errors like this:

Error compiling Cython file:
------------------------------------------------------------
...
        vertex_format.last_shader = self
        for i in xrange(vertex_format.vattr_count):
            attr = &vertex_format.vattr[i]
            if attr.per_vertex == 0:
                continue
            attr.index = glGetAttribLocation(self.program, <char *><bytes>attr.name)
                                                          ^
------------------------------------------------------------

kivy/graphics/shader.pyx:448:63: Casting temporary Python object to non-numeric non-Python type

      

        
        
        
      

    

Found this answer which didn't help solve my problem:

sudo apt-get remove --purge cython
sudo pip install cython

      

        
        
        
      

    

Do I need a specific version of Cython?

Thank!

Update

Thanks to @RyanP, I tried to run:

cython -V
cython shader.pyx

      

        
        
        
      

    

Well the Cython version looks ok:

Cython version 0.21

      

        
        
        
      

    

But still shader.pyx won't compile with the same error.

Another update

I did both:

• Used the advice of @inclement and removed both build
  
  and dist
  
  .
• Used by export P4A_kivy_DIR=/path/to/cloned/kivy/
  
  

Finally it was created dist/default

.