diff --git a/build.xml b/build.xml
index 728e03f..ec6db86 100644
--- a/build.xml
+++ b/build.xml
@@ -31,10 +31,18 @@
   <target name="clean">
     <delete dir="${build.dir}"/>
     <delete dir="${classes.dir}"/>
-	<exec executable="make clean" dir="${libs.omx.dir}"/>
-	<exec executable="make clean" dir="${libs.opus.dir}"/>
-	<exec executable="make clean" dir="${libs.alsa.dir}"/>
-	<exec executable="make clean" dir="${libs.io.dir}"/>
+	<exec executable="make" dir="${libs.omx.dir}">
+		<arg line="clean"/>
+	</exec>
+	<exec executable="make" dir="${libs.opus.dir}">
+		<arg line="clean"/>
+	</exec>
+	<exec executable="make" dir="${libs.alsa.dir}">
+		<arg line="clean"/>
+	</exec>
+	<exec executable="make" dir="${libs.io.dir}">
+		<arg line="clean"/>
+	</exec>
   </target>
 
   <target name="all" depends="clean, dist"/>