Unity can not merge AndroidManifest files because it claims not to find a tag that appears to be set

I'm getting a strange error when trying to build an android version of our application

Temp/StagingArea/android-libraries/CropLib/AndroidManifest.xml:6] Undefined 'name' attribute in /manifest/uses-permission

Which is odd as when I look at the manifest file it has a name attribute on both the uses-permission. Here is the whole manifest file.

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="https://schemas.android.com/apk/res/android"
           package="eu.janmuller.android.simplecropimage"
           android:versionCode="1"
           android:versionName="1.0">
 
     <activity 
         android:name="com.astricstore.imagevideocontactpicker.AndroidPickerActivity"
         android:configChanges="orientation|keyboardHidden|screenSize">
     </activity>
 
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 
 </manifest>

Any Ideas on what I'm missing? I'm using tools version 23 and unity 5.5.0f3.