diff -urEwbB fop-2.10/fop/build.xml fop-2.10/fop/build.xml
--- fop-2.10/fop/build.xml	2024-10-11 13:58:44.468271086 +0200
+++ fop-2.10/fop/build.xml	2024-10-11 14:04:37.160704185 +0200
@@ -94,8 +94,9 @@
   <property name="javac.debug" value="on"/>
   <property name="javac.optimize" value="off"/>
   <property name="javac.deprecation" value="on"/>
-  <property name="javac.source" value="1.8"/>
-  <property name="javac.target" value="1.8"/>
+  <property name="javac.release" value="8"/>
+  <property name="javac.source" value="1.${javac.release}"/>
+  <property name="javac.target" value="${javac.source}"/>
   <property name="javac.fork" value="no"/>
   <property name="junit.fork" value="yes"/>
   <property name="junit.haltonfailure" value="off"/>
@@ -186,7 +187,7 @@
       debug="${javac.debug}"
       deprecation="${javac.deprecation}"
       optimize="${javac.optimize}" encoding="utf-8"
-      source="${javac.source}" target="${javac.target}"/>
+      release="${javac.release}" source="${javac.source}" target="${javac.target}"/>
   </presetdef>
   
   <presetdef name="junit">