Index: apache-tomcat-9.0.91-src/build.xml
===================================================================
--- apache-tomcat-9.0.91-src.orig/build.xml
+++ apache-tomcat-9.0.91-src/build.xml
@@ -107,7 +107,7 @@
   <!-- Keep in sync with webapps/docs/tomcat-docs.xsl -->
   <property name="compile.release" value="8"/>
   <property name="min.java.version" value="8"/>
-  <property name="build.java.version" value="17"/>
+  <property name="build.java.version" value="11"/>
   <property name="release.java.version" value="17"/>
   <property name="skip.build.java.version" value="false"/>