Downgrade

Package-Manager: portage-2.2.8-r1
RepoMan-Options: --force

dev-java/isnativec/files/build.properties

@@ -5,5 +5,6 @@ build.dir=build
 libs.dir=.
 isrt.jar.name=isrt
 jna.jar.name=jna
+jna.plattform.jar.name=platform
 isnativec.jar.name=isnativec
 

dev-java/isnativec/files/build.xml

@@ -39,6 +39,7 @@
 	 	<fileset dir="${libs.dir}">
 	        <include name="**/${isrt.jar.name}.jar"/>
 	        <include name="**/${jna.jar.name}.jar"/>
+	        <include name="**/${jna.platform.jar.name}.jar"/>
 	    </fileset>
     	<pathelement path="${isnativec.build.dir}"/>
     </path>