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There is nothing wrong with what I have mentioned above!

BUT there is a command inside Android Scala Installer which requests the "/system" folder to be mounted as writable. Unfortunately this does not work on my gingerbread android phone and this might be the general case.

I simply commented out the operation of the mount /system as writable (and also the command mount /system as read only) and the libraries installed successfully!
Note that I set manually the permissions of /system as writable before installing libraries

In fact I forked the github repository and therefore you can find me implementation over here:

To summarize. Yes the only alterations needed in your scala android source code is to set the settings in Build.scala file for proguard to be false and you include the uses <uses-library android:name="scala_... inside Android Manifest.

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