--- db-derby-10.13.1.1-src/java/build/org/apache/derbyPreBuild/build.xml	2018-05-16 13:30:53.990766012 +0200
+++ db-derby-10.13.1.1-src/java/build/org/apache/derbyPreBuild/build.xml	2018-05-16 13:32:46.391353234 +0200
@@ -31,8 +31,8 @@
 
   <target name="compile">
     <javac
-      source="1.6"
-      target="1.6"
+      source="1.8"
+      target="1.8"
       nowarn="on"
       debug="true"
       depend="${depend}"