Android kivy buildozer错误：Cython似乎未安装

我正试图使用buildozer为我的python kivy gui制作一个apk，但是进程停止了，出现了错误

error:Cython似乎没有安装

我不明白这一点，因为我已经安装了cython，那么为什么它说cython没有安装呢？我该如何解决这个问题

`/home/koushik/Desktop/.buildozer/android/platform/python-for-android/build/python-install/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'install_requires'
  warnings.warn(msg)
running build_ext
failed to import Cython: /home/koushik/Desktop/.buildozer/android/platform/python-for-android/build/python-install/lib/python2.7/lib-dynload/_io.so: wrong ELF class: ELFCLASS32
error: Cython does not appear to be installed
# Command failed: ./distribute.sh -m "kivy" -d "rlc_and"
# 
# Buildozer failed to execute the last command