diff --git a/src/psr4/.build.xml b/src/psr4/.build.xml
index 540054c..5c4bf71 100644
--- a/src/psr4/.build.xml
+++ b/src/psr4/.build.xml
@@ -538,7 +538,7 @@
     <echo msg="------------------------------------" />
 
     <echo msg="Creating ZIP file: ${project.basedir}/.~build/${project_slug}.zip" />
-    <zip basedir="${project.basedir}" destfile="${project.basedir}/.~build/${project_slug}.zip">
+    <zip basedir="${project.basedir}" prefix="${project_slug}/" includeemptydirs="false" destfile="${project.basedir}/.~build/${project_slug}.zip">
       <fileset refid="_zip_tgz_fileset" />
     </zip>
     <echo msg="------------------------------------" />
@@ -550,7 +550,7 @@
     <echo msg="------------------------------------" />
 
     <echo msg="Creating TGZ file: ${project.basedir}/.~build/${project_slug}.tar.gz" />
-    <tar basedir="${project.basedir}" destfile="${project.basedir}/.~build/${project_slug}.tar.gz" compression="gzip">
+    <tar basedir="${project.basedir}" prefix="${project_slug}/" includeemptydirs="false" destfile="${project.basedir}/.~build/${project_slug}.tar.gz" compression="gzip">
       <fileset refid="_zip_tgz_fileset" />
     </tar>
     <echo msg="------------------------------------" />