TypeError: 'encoding' is an invalid keyword argument for this function

[guruyaya]

I'm trying to build an android app from my kivy code (pretty standart, no extra libs beside kivy), on a elementry-os luna machine, using latest buildozer installed from github.
I keep getting this error:

Check application requirements

Run './distribute.sh -l'

Cwd /home/guruyaya/rememberthekivy/.buildozer/android/platform/python-for-android

Available modules: android audiostream c_igraph cymunk django docutils ffmpeg gevent greenlet hostpython igraph jpeg kivent kivy libevent libxml2 libxslt lxml msgpack mysql_connector numpy openssl paramiko pil plyer png pyasn1 pycrypto pygame pyjnius pylibpd pyopenssl pyparsing pyqrcode python sdl setuptools sqlalchemy sqlite3 twisted txws wokkel zope

Application requirements already installed, pass

Traceback (most recent call last):
File "/usr/local/bin/buildozer", line 9, in
load_entry_point('buildozer==0.12-dev', 'console_scripts', 'buildozer')()
File "/usr/local/lib/python2.7/dist-packages/buildozer-0.12_dev-py2.7.egg/buildozer/scripts/client.py", line 13, in main
Buildozer().run_command(sys.argv[1:])
File "/usr/local/lib/python2.7/dist-packages/buildozer-0.12_dev-py2.7.egg/buildozer/init.py", line 940, in run_command
self.target.run_commands(args)
File "/usr/local/lib/python2.7/dist-packages/buildozer-0.12_dev-py2.7.egg/buildozer/target.py", line 85, in run_commands
func(args)
File "/usr/local/lib/python2.7/dist-packages/buildozer-0.12_dev-py2.7.egg/buildozer/target.py", line 95, in cmd_debug
self.buildozer.prepare_for_build()
File "/usr/local/lib/python2.7/dist-packages/buildozer-0.12_dev-py2.7.egg/buildozer/init.py", line 163, in prepare_for_build
self.check_garden_requirements()
File "/usr/local/lib/python2.7/dist-packages/buildozer-0.12_dev-py2.7.egg/buildozer/init.py", line 470, in check_garden_requirements
self.state['cache.gardenlibs'] = garden_requirements
File "/usr/local/lib/python2.7/dist-packages/buildozer-0.12_dev-py2.7.egg/buildozer/jsonstore.py", line 31, in setitem
self.sync()
File "/usr/local/lib/python2.7/dist-packages/buildozer-0.12_dev-py2.7.egg/buildozer/jsonstore.py", line 47, in sync
with open(self.filename, 'w', encoding='utf-8') as fd:
TypeError: 'encoding' is an invalid keyword argument for this function

Anyone?

[tito]

This is already fixed, please update your buildozer :)