diff --git a/Engine/SBus/SBusJavaFacade/build.xml b/Engine/SBus/SBusJavaFacade/build.xml
index 44065cce..c361cb97 100644
--- a/Engine/SBus/SBusJavaFacade/build.xml
+++ b/Engine/SBus/SBusJavaFacade/build.xml
@@ -53,7 +53,7 @@
 		<move file="SBusJavaFacade.jar" todir="bin/"/>
 	</target>
 	
-    <target name="build" depends="jar">
+    <target name="build" depends="clean, jar">
     </target>
 	
 </project>
diff --git a/Engine/SCommon/build.xml b/Engine/SCommon/build.xml
index c7700978..e8e1800a 100644
--- a/Engine/SCommon/build.xml
+++ b/Engine/SCommon/build.xml
@@ -50,7 +50,7 @@
         <move file="SCommon.jar" todir="bin/" />
     </target>
 
-	<target name="build" depends="jar">
+	<target name="build" depends="clean, jar">
 	</target>
 
 </project>
diff --git a/Engine/SDaemon/build.xml b/Engine/SDaemon/build.xml
index e4b6192d..4a7a5e0a 100644
--- a/Engine/SDaemon/build.xml
+++ b/Engine/SDaemon/build.xml
@@ -51,6 +51,6 @@
         <move file="SDaemon.jar" todir="bin/" />
     </target>
 
-    <target name="build" depends="jar">
+    <target name="build" depends="clean, jar">
     </target>
 </project>
diff --git a/StorletSamples/ExecDepStorlet/build.xml b/StorletSamples/ExecDepStorlet/build.xml
index 13b8cb22..65d0dda9 100644
--- a/StorletSamples/ExecDepStorlet/build.xml
+++ b/StorletSamples/ExecDepStorlet/build.xml
@@ -51,6 +51,6 @@
 		<echo message="Some junk content" file="bin/junk.txt" />
 	</target>
 
-	<target name="build" depends="jar,exe,text">
+	<target name="build" depends="clean,jar,exe,text">
 	</target>
 </project>
diff --git a/StorletSamples/IdentityStorlet/build.xml b/StorletSamples/IdentityStorlet/build.xml
index 04772c71..541f31df 100644
--- a/StorletSamples/IdentityStorlet/build.xml
+++ b/StorletSamples/IdentityStorlet/build.xml
@@ -51,6 +51,6 @@
 		<echo message="Some content to copy" file="bin/source.txt" />
 	</target>
 
-	<target name="build" depends="jar,exe,text">
+	<target name="build" depends="clean, jar,exe,text">
 	</target>
 </project>
diff --git a/StorletSamples/TestMetadataStorlet/build.xml b/StorletSamples/TestMetadataStorlet/build.xml
index ede5adaa..ee13766f 100644
--- a/StorletSamples/TestMetadataStorlet/build.xml
+++ b/StorletSamples/TestMetadataStorlet/build.xml
@@ -41,6 +41,6 @@
 		<delete dir="bin" />
 	</target>
 	
-	<target name="build" depends="common, text, testmetadatastorlet"/>
+	<target name="build" depends="clean, common, text, testmetadatastorlet"/>
 
 </project>
diff --git a/StorletSamples/TestStorlet/build.xml b/StorletSamples/TestStorlet/build.xml
index e3c4fed8..7d518a35 100644
--- a/StorletSamples/TestStorlet/build.xml
+++ b/StorletSamples/TestStorlet/build.xml
@@ -37,6 +37,6 @@
 		<delete dir="bin" />
 	</target>
 	
-	<target name="build" depends="common, test"/>
+	<target name="build" depends="clean, common, test"/>
 
 </project>