Generate source jar only once

pom.xml

@@ -281,8 +281,27 @@
    </build>
 
    <profiles>
+      <!--
+      This profile is active by default and will disable the generation of the source jar.
+      When the native profile (see below) is active, the source jar will be generated.
+      If we don't do it like this, the source jar is created and attached twice, which
+      trips up Maven: "We have duplicated artifacts attached."
+      -->
+      <profile>
+         <id>non-native</id>
+         <activation>
+            <activeByDefault>true</activeByDefault>
+         </activation>
+         <properties>
+            <maven.source.skip>true</maven.source.skip>
+         </properties>
+      </profile>
+
       <profile>
          <id>native</id>
+         <properties>
+            <maven.source.skip>false</maven.source.skip>
+         </properties>
          <build>
             <plugins>
                <plugin>