We should avoid .git files as they may spook building of packages

common.xml

@@ -149,9 +149,13 @@
  </target>
 
  <target name="fill-secondary">
-  <exec executable="cp" failonerror="true">
-   <arg line="-drv ${basedir}/packages ${sysdir}"/>
-  </exec>
+  <mkdir dir="${sysdir}/packages"/>
+  <copy todir="${sysdir}/packages" failonerror="true">
+   <fileset dir="${basedir}/packages">
+    <include name="**/*"/>
+    <exclude name="**/.git"/>
+   </fileset>
+  </copy>
   <exec executable="cp" failonerror="true">
    <arg line="-drv ${basedir}/build-system/Makefile.common ${sysdir}/packages"/>
   </exec>