Buildozer -v android debug (Ubuntu 18.04 venv Python3 Kivy 1.11.1)

Сразу после начала ...

[INFO]:    Found NDK dir in $ANDROIDNDK: /home/vasco/.buildozer/android/platform/android-ndk-r17c
[INFO]:    Found NDK revision 17.2.4988734
[INFO]:    Getting NDK API version (i.e. minimum supported API) from user argument
[INFO]:    Found virtualenv at /home/vasco/Py/Kivy/venv/bin/virtualenv
[INFO]:    Found the following toolchain versions: ['4.9']
[INFO]:    Picking the latest gcc toolchain, here 4.9
[WARNING]: Missing executable: pkg-config is not installed
[WARNING]: Missing executable: autoconf is not installed
[WARNING]: Missing executable: automake is not installed
[WARNING]: Missing executable: libtoolize is not installed
[INFO]:    No existing dists meet the given requirements!
[INFO]:    No dist exists that meets your requirements, so one will be built.
[INFO]:    Found a single valid recipe set: ['hostpython3', 'libffi', 'openssl', 'sdl2_image', 'sdl2_mix$
[INFO]:    The selected bootstrap is sdl2
[INFO]:    # Creating dist with sdl2 bootstrap
[INFO]:    Dist will have name myapp and requirements (python3, kivy)
.....
sh.ErrorReturnCode_127:
RAN: /home/vasco/Py/Kivy/.buildozer/android/platform/build/build/other_builds/libffi/armeabi-v7a__ndk_$
  STDOUT:
/home/vasco/Py/Kivy/.buildozer/android/platform/build/build/other_builds/libffi/armeabi-v7a__ndk_target_$
  STDERR:

# Command failed: /home/vasco/Py/Kivy/venv/bin/python3 -m pythonforandroid.toolchain create --dist_name=$
# 
# Buildozer failed to execute the last command
# The error might be hidden in the log above this error
# Please read the full log, and search for it before
# raising an issue with buildozer itself.
# In case of a bug report, please add a full log with log_level = 2

У кого-нибудь есть идеи о том, как выбраться из этой проблемы? Смежному вопросу, который я видел только сейчас, 9 месяцев, и никто не решился на это.

Заранее благодарю за помощь.