Comment # 15 on bug 1031295 from Fabian Vogt

So I made the mentioned change to the control.xml file:

       <system_role>
         <id>custom</id>
         <!-- We need a manual selection here, see c11 on boo#1031295 -->
+        <software>
+          <default_patterns>base minimal</default_patterns>
+        </software>
       </system_role>

This works, but there's a bug which is highly misleading for the user:
The pattern changes are only applied during the installation overview!

So after the user selects custom, there's a selection screen, but the
default_patterns are not selected there.

YaST2 logs are attached, ignore that one of the pattern names is wrong.

Reassigning to YaST team.