Index: /applications/editors/josm/plugins/build-common.xml
===================================================================
--- /applications/editors/josm/plugins/build-common.xml	(revision 34372)
+++ /applications/editors/josm/plugins/build-common.xml	(revision 34373)
@@ -98,10 +98,8 @@
         <echo message="compiling sources for ${plugin.jar} ..."/>
         <javac compiler="${javac.compiler}" srcdir="${plugin.src.dir}" debug="true" destdir="${plugin.build.dir}" includeantruntime="false"
-            encoding="UTF-8" source="${java.lang.version}">
+            encoding="UTF-8" target="${java.lang.version}" source="${java.lang.version}">
             <compilerclasspath>
                 <pathelement location="${error_prone_ant.jar}"/>
             </compilerclasspath>
-            <compilerarg value="--add-modules" if:set="isJava9" unless:set="isJava11" />
-            <compilerarg value="java.activation,java.se.ee" if:set="isJava9" unless:set="isJava11" />
             <compilerarg value="-Xlint:deprecation"/>
             <compilerarg value="-Xlint:unchecked"/>
@@ -526,11 +524,9 @@
         <sequential>
             <javac debug="on" includeantruntime="false" srcdir="${plugin.test.dir}/unit" destdir="${plugin.test.dir}/build/unit" encoding="UTF-8"
-                source="${java.lang.version}">
+                target="${java.lang.version}" source="${java.lang.version}">
                 <classpath>
                     <fileset refid="plugin.requires.jars"/>
                     <path refid="test.classpath"/>
                 </classpath>
-                <compilerarg value="--add-modules" if:set="isJava9" unless:set="isJava11" />
-                <compilerarg value="java.activation,java.se.ee" if:set="isJava9" unless:set="isJava11" />
 				<compilerarg value="-Xlint:all"/>
 				<compilerarg value="-Xlint:-serial"/>