diff --git a/build.xml b/build.xml
index e9d21fd2..6c6ccdb5 100644
--- a/build.xml
+++ b/build.xml
@@ -118,10 +118,11 @@
             <define name="VERSION" value="${version}"/>
         </nsis>
         <!-- source package -->
-        <tar tarfile="dist/davmail-src-${version}.tgz" compression="gzip">
+        <tar tarfile="dist/davmail-src-${version}.tgz" compression="gzip" longfile="gnu">
             <tarfileset prefix="davmail-src-${version}" dir=".">
                 <include name="**/*"/>
                 <exclude name="dist"/>
+                <exclude name="target"/>
             </tarfileset>
         </tar>
     </target>