diff --git a/apps/sam/jython/build.xml b/apps/sam/jython/build.xml
index 35cffd8b0..fed791265 100644
--- a/apps/sam/jython/build.xml
+++ b/apps/sam/jython/build.xml
@@ -11,6 +11,7 @@
     </target>
 
     <target name="jar">
+        <mkdir dir="./build" />
         <exec executable="jythonc">
             <env key="CLASSPATH" path="../../../core/java/build/i2p.jar:../../ministreaming/java/build/mstreaming.jar"/>
             <arg value="--jar"/>