How to add META-INF/services to the war?

I have a Vaadin 7 maven web project that has some annotations that create service definition on META-INF/services.

I added this to the pom so the annotations are processed:

<!-- Run annotation processors on src/main/java sources -->
            <plugin>
                <groupId>org.bsc.maven</groupId>
                <artifactId>maven-processor-plugin</artifactId>
                        <version>3.3.1</version>
                <executions>
                    <execution>
                        <id>process</id>
                        <goals>
                            <goal>process</goal>
                        </goals>
                        <phase>generate-sources</phase>
                    </execution>
                </executions>
            </plugin>

The files show within target/classes/META-INF/services but don't make it to the final war.

I tried adding the folder to the maven-war-plugin like this:

<plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.0.0</version>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                    <packagingIncludes>target/classes/*</packagingIncludes>
                </configuration>
            </plugin>

But then most of the Vadin files don't make it into the war and it doesn't work. Any idea?

My guess: as soon as you specify packagingIncludes for maven-war-plugin, only the listed entries are included, and your list does not include everything needed. See http://maven.apache.org/plugins-archives/maven-war-plugin-2.3/war-mojo.html#packagingIncludes