title: Failure to find android:android:jar:6.0_r1
body: <p>I'm trying to build <a href="https://github.com/osmdroid/osmdroid" rel="nofollow">OSMdroid</a> with this command:<br>
  <code>&gt;mvn clean install</code></p>
  
  <p>The build fails and gives this error:</p>
  
  <pre><code>[ERROR] Failed to execute goal on project osmdroid-android: 
  Could not resolve dependencies for project org.osmdroid:osmdroid-android:aar:4.4-SNAPSHOT: 
  Failure to find android:android:jar:6.0_r1 in https://repo.maven.apache.org/maven2 
  was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced
  </code></pre>
  
  <p>We are behind a firewall and the network people here have assured me that everything at <code>https://repo1.maven.org/maven2/</code> is being allowed.</p>
  
  <p>So perhaps what it is looking for is really not there. I'm not sure what <code>android:android:jar:6.0_r1</code> is. If I browse to <a href="https://repo1.maven.org/maven2/" rel="nofollow">https://repo1.maven.org/maven2/</a>, I don't see a directory named <code>android</code></p>
  
  <p>Any ideas?</p>
  
  <p>Windows 7</p>
  
  <p>Tried deleting contents of <code>C:\Users\myusername\.m2\repository</code>, but this had no effect.</p>
  
  <p>The root of the problem seems to be that it is failing to download certain jars from the maven repository:</p>
  
  <pre><code>[WARNING] The POM for android.support:compatibility-v4:jar:23.1.0 is missing, no dependency information available
  [WARNING] The POM for com.google.android.maps:maps:jar:23_r1 is missing, no dependency information available
  [WARNING] The POM for com.google.android.gms:google-play-services:jar:27.0.0 is missing, no dependency information available
  [WARNING] The POM for android:android:jar:6.0_r1 is missing, no dependency information available
  </code></pre>