Index: applications/editors/josm/plugins/opendata/pom.xml
===================================================================
--- applications/editors/josm/plugins/opendata/pom.xml	(revision 36335)
+++ applications/editors/josm/plugins/opendata/pom.xml	(revision 36336)
@@ -82,4 +82,16 @@
         <plugins>
             <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-clean-plugin</artifactId>
+                <configuration>
+                    <filesets>
+                        <fileset>
+                            <!-- Only needed while we keep ant scripts around -->
+                            <directory>includes/neptune</directory>
+                        </fileset>
+                    </filesets>
+                </configuration>
+            </plugin>
+            <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>build-helper-maven-plugin</artifactId>