diff --git a/gradle/plugin/build.gradle b/gradle/plugin/build.gradle
index 1104208213..4f9ad06c8f 100644
--- a/gradle/plugin/build.gradle
+++ b/gradle/plugin/build.gradle
@@ -96,6 +96,15 @@ tasks.named('publishPlugins') {
     }
 }
 
+var rootPath = findProperty("mavenRootDirectory")
+jar {
+	metaInf {
+		from(rootPath, {
+			include "LICENSE.txt"
+		})
+	}
+}
+
 publishing {
     publications {
         pluginMaven(MavenPublication) {
diff --git a/gradle/pom.xml b/gradle/pom.xml
index 1c8e6c1aeb..fdebb4b734 100644
--- a/gradle/pom.xml
+++ b/gradle/pom.xml
@@ -70,6 +70,7 @@
                                 <argument>-PprojectVersion=${project.version}</argument>
                                 <argument>-Ph2Version=${h2.version}</argument>
                                 <argument>-Dmaven.repo.local=${settings.localRepository}</argument>
+                                <argument>-PmavenRootDirectory=${rootProject.directory}</argument>
                             </arguments>
                         </configuration>
                         <goals>
@@ -122,6 +123,7 @@
                                         <argument>-PprojectVersion=${project.version}</argument>
                                         <argument>-Ph2Version=${h2.version}</argument>
                                         <argument>-Dmaven.repo.local=${settings.localRepository}</argument>
+                                        <argument>-PmavenRootDirectory=${rootProject.directory}</argument>
                                         <argument>-PmavenStagingDirectory=${local.staging.releases.repo.url}</argument>
                                     </arguments>
                                 </configuration>
diff --git a/pom.xml b/pom.xml
index 6f0e60141a..290e99ecf4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -152,6 +152,18 @@
         <maven.min.version>${maven.version}</maven.min.version>
         <maven-core.version>${maven.version}</maven-core.version>
 
+        <!--
+             The absolute path to the root project directory.
+             This property is set by the build-helper plugin.
+             We initialize it to some crude, potentially wrong value,
+             because the Sonar Maven plugin uses this property indirectly,
+             but ignores any change made by other plugins.
+             This default value is the best we can do without the help of a Maven plugin.
+
+             Useful resources:
+              - https://www.mojohaus.org/build-helper-maven-plugin/rootlocation-mojo.html
+          -->
+        <rootProject.directory>${user.dir}</rootProject.directory>
     </properties>
 
     <dependencyManagement>
@@ -315,6 +327,20 @@
     </distributionManagement>
 
     <build>
+        <resources>
+            <resource>
+                <!-- The default resource dir: -->
+                <directory>${project.basedir}/src/main/resources</directory>
+            </resource>
+            <resource>
+                <!-- Extra dir to include the license file: -->
+                <directory>${rootProject.directory}</directory>
+                <includes>
+                    <include>LICENSE.txt</include>
+                </includes>
+                <targetPath>META-INF</targetPath>
+            </resource>
+        </resources>
         <pluginManagement>
             <plugins>
                 <plugin>
@@ -386,6 +412,21 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>build-helper-maven-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>set-root-location-property</id>
+                        <goals>
+                            <goal>rootlocation</goal>
+                        </goals>
+                        <configuration>
+                            <rootLocationProperty>rootProject.directory</rootLocationProperty>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
         </plugins>
     </build>