diff --git a/ci/constants.py b/ci/constants.py
new file mode 100644
index 0000000000..2d614cfe88
--- /dev/null
+++ b/ci/constants.py
@@ -0,0 +1,63 @@
+from enum import Enum
+
+
+class TargetPython(Enum):
+    python2 = 0
+    python3crystax = 1
+
+
+# recipes that currently break the build
+# a recipe could be broken for a target Python and not for the other,
+# hence we're maintaining one list per Python target
+BROKEN_RECIPES_PYTHON2 = set([])
+BROKEN_RECIPES_PYTHON3_CRYSTAX = set([
+    # not yet python3crystax compatible
+    'apsw', 'atom', 'boost', 'brokenrecipe', 'cdecimal', 'cherrypy',
+    'coverage', 'dateutil', 'enaml', 'ethash', 'kiwisolver', 'libgeos',
+    'libnacl', 'libsodium', 'libtorrent', 'libtribler', 'libzbar', 'libzmq',
+    'm2crypto', 'mysqldb', 'ndghttpsclient', 'pil', 'pycrypto', 'pyethereum',
+    'pygame', 'pyleveldb', 'pyproj', 'pyzmq', 'regex', 'shapely',
+    'simple-crypt', 'twsisted', 'vispy', 'websocket-client', 'zbar',
+    'zeroconf', 'zope',
+    # https://github.com/kivy/python-for-android/issues/550
+    'audiostream',
+    # enum34 is not compatible with Python 3.6 standard library
+    # https://stackoverflow.com/a/45716067/185510
+    'enum34',
+    # https://github.com/kivy/python-for-android/issues/1398
+    'ifaddrs',
+    # https://github.com/kivy/python-for-android/issues/1399
+    'libglob',
+    # cannot find -lcrystax
+    'cffi', 'pycryptodome', 'pymuk', 'secp256k1',
+    # https://github.com/kivy/python-for-android/issues/1404
+    'cryptography',
+    # https://github.com/kivy/python-for-android/issues/1294
+    'ffmpeg', 'ffpyplayer',
+    # https://github.com/kivy/python-for-android/pull/1307 ?
+    'gevent',
+    'icu',
+    # https://github.com/kivy/python-for-android/issues/1354
+    'kivent_core', 'kivent_cymunk', 'kivent_particles', 'kivent_polygen',
+    'kivy',
+    # https://github.com/kivy/python-for-android/issues/1405
+    'libpq', 'psycopg2',
+    'netifaces',
+    # https://github.com/kivy/python-for-android/issues/1315 ?
+    'opencv',
+    'protobuf_cpp',
+    # most likely some setup in the Docker container, because it works in host
+    'pyjnius', 'pyopenal',
+    # SyntaxError: invalid syntax (Python2)
+    'storm',
+    'vlc',
+])
+BROKEN_RECIPES = {
+    TargetPython.python2: BROKEN_RECIPES_PYTHON2,
+    TargetPython.python3crystax: BROKEN_RECIPES_PYTHON3_CRYSTAX,
+}
+# recipes that were already built will be skipped
+CORE_RECIPES = set([
+    'pyjnius', 'kivy', 'openssl', 'requests', 'sqlite3', 'setuptools',
+    'numpy', 'android', 'python2',
+])
diff --git a/ci/rebuild_updated_recipes.py b/ci/rebuild_updated_recipes.py
index 82e80600a7..870238994c 100755
--- a/ci/rebuild_updated_recipes.py
+++ b/ci/rebuild_updated_recipes.py
@@ -25,44 +25,8 @@
 """
 import sh
 import os
-from enum import Enum
 from pythonforandroid.toolchain import current_directory
-
-
-class TargetPython(Enum):
-    python2 = 0
-    python3crystax = 1
-
-
-# recipes that currently break the build
-# a recipe could be broken for a target Python and not for the other,
-# hence we're maintaining one list per Python target
-BROKEN_RECIPES_PYTHON2 = set([])
-BROKEN_RECIPES_PYTHON3_CRYSTAX = set([
-    # not yet python3crystax compatible
-    'apsw', 'atom', 'boost', 'brokenrecipe', 'cdecimal', 'cherrypy',
-    'coverage',
-    # https://github.com/kivy/python-for-android/issues/550
-    'audiostream',
-    # enum34 is not compatible with Python 3.6 standard library
-    # https://stackoverflow.com/a/45716067/185510
-    'enum34',
-    # https://github.com/kivy/python-for-android/issues/1398
-    'ifaddrs',
-    # https://github.com/kivy/python-for-android/issues/1399
-    'libglob',
-    # cannot find -lcrystax
-    'cffi',
-])
-BROKEN_RECIPES = {
-    TargetPython.python2: BROKEN_RECIPES_PYTHON2,
-    TargetPython.python3crystax: BROKEN_RECIPES_PYTHON3_CRYSTAX,
-}
-# recipes that are were already built
-CORE_RECIPES = set([
-    'pyjnius', 'kivy', 'openssl', 'requests', 'sqlite3', 'setuptools',
-    'numpy', 'android',
-])
+from ci.constants import TargetPython, CORE_RECIPES, BROKEN_RECIPES
 
 
 def modified_recipes(branch='origin/master'):