Plz

gson/pom.xml

@@ -131,6 +131,13 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-shade-plugin</artifactId>
         <version>3.4.1</version>
+        <configuration>
+          <artifactSet>
+            <excludes>
+              <exclude>module-info.java</exclude>
+            </excludes>
+          </artifactSet>
+        </configuration>
         <executions>
           <execution>
             <phase>package</phase>
@@ -148,6 +155,26 @@
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <groupId>org.moditect</groupId>
+        <artifactId>moditect-maven-plugin</artifactId>
+        <version>1.0.0.RC2</version>
+        <executions>
+          <execution>
+            <id>add-module-infos</id>
+            <phase>package</phase>
+            <goals>
+              <goal>add-module-info</goal>
+            </goals>
+            <configuration>
+              <overwriteExistingFiles>true</overwriteExistingFiles>
+              <module>
+                <moduleInfoFile>src/main/java/module-info.java</moduleInfoFile>
+              </module>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
     </plugins>
   </build>
 </project>