diff --git a/README.md b/README.md
index c5365d5..a127d81 100644
--- a/README.md
+++ b/README.md
@@ -2,23 +2,31 @@
 
 Mobile app, client of flock server.
 
-
 ## Development
 
 Install dependencies like so:
 
-```
-$ pip install -r requirements.txt
+    $ pip install -r requirements.txt
+
+[It might be necessary](https://github.com/kivy/buildozer/issues/769) to
+manually download an android NDK. If so, go to [ndk
+downloads](https://developer.android.com/ndk/downloads/) and get the appropiate
+version. Put it somewhere (it could be inside this repository) and adjust
+`android.ndk_path` in `buildozer.spec`. Relative paths are valid, so this is a
+sensible value:
+
+```ini
+# (str) Android NDK directory (if empty, it will be automatically downloaded.)
+android.ndk_path = ./android-ndk-r25b-linux
 ```
 
 ## Test building
 
-Kivy apps are easily deployed and tested with [buildozer](https://buildozer.readthedocs.io/en/latest/quickstart.html#init-and-build-for-android).
+Kivy apps are easily deployed and tested with
+[buildozer](https://buildozer.readthedocs.io/en/latest/quickstart.html#init-and-build-for-android).
 
 This command will compile the app, transfer it to a usb-connected
 device and run it. Logs are shown on the console, hence the grep
 python.
 
-```
-$ buildozer -v android debug deploy run logcat | grep python
-```
+    $ buildozer -v android debug deploy run logcat | grep python
diff --git a/buildozer.spec b/buildozer.spec
index ff23c26..ca2e4e6 100644
--- a/buildozer.spec
+++ b/buildozer.spec
@@ -30,6 +30,7 @@ source.include_exts = py,png,jpg,kv,atlas
 # (str) Application versioning (method 1)
 version = 0.2
 
+
 # (str) Application versioning (method 2)
 # version.regex = __version__ = ['"](.*)['"]
 # version.filename = %(source.dir)s/main.py
@@ -164,14 +165,14 @@ android.permissions = INTERNET,ACCESS_FINE_LOCATION,ACCESS_COARSE_LOCATION,WAKE_
 # android.add_compile_options = "sourceCompatibility = 1.8", "targetCompatibility = 1.8"
 
 # (list) Gradle repositories to add {can be necessary for some android.gradle_dependencies}
-# please enclose in double quotes 
+# please enclose in double quotes
 # e.g. android.gradle_repositories = "maven { url 'https://kotlin.bintray.com/ktor' }"
 #android.add_gradle_repositories =
 
-# (list) packaging options to add 
+# (list) packaging options to add
 # see https://google.github.io/android-gradle-dsl/current/com.android.build.gradle.internal.dsl.PackagingOptions.html
 # can be necessary to solve conflicts in gradle_dependencies
-# please enclose in double quotes 
+# please enclose in double quotes
 # e.g. android.add_packaging_options = "exclude 'META-INF/common.kotlin_module'", "exclude 'META-INF/*.kotlin_module'"
 #android.add_gradle_repositories =