Updated Readme

Author: dominicletz

README.md

@@ -4,6 +4,8 @@ This Android Studio project wraps the [Desktop Sample App](https://github.com/el
 
 ## How to build & run
 
+1. Install the beta OTP build *(see known issues)
+   
 1. Install [Android Studio](https://developer.android.com/studio) + NDK.
 
 1. Go to "Files -> New -> Project from Version Control" and enter this URL: https://github.com/elixir-desktop/android-example-app/ 
@@ -18,6 +20,15 @@ This Android Studio project wraps the [Desktop Sample App](https://github.com/el
 
 ### Update built-in Runtime
 
+To have the embedded Erlang match the one you use for compilation you can install
+the same version as the embedded:
+
+```bash
+mkdir -p ~/projects/
+kerl build git https://github.com/diodechain/otp.git diode/beta 24.beta
+kerl install 24.beta ~/projects/24.beta
+```
+
 The current runtime that is precompiled and sits in assets/ folder is based on dev branch of OTP currently under
 https://github.com/diodechain/otp/tree/diode/beta
 Because the included OTP apps have different versions such as `crypto-5.0.3` you can only compile this project 

run_mix

@@ -1,8 +1,14 @@
 #!/bin/bash
-
+set -e
 BASE=`pwd`
-# Here activate your Erlang/Elixir version, in my case this is using kerl:
-# . /Users/dominicletz/projects/24.beta/activate
+# Here activate your Erlang/Elixir version, in my case this is using kerl.
+# To have the embedded Erlang match the one you use for compilation you can install
+# the same version as the embedded:
+# mkdir -p ~/projects/
+# kerl build git https://github.com/diodechain/otp.git diode/beta 24.beta
+# kerl install 24.beta ~/projects/24.beta
+
+. ~/projects/24.beta/activate
 export MIX_ENV=prod
 export MIX_TARGET=android