diff --git a/.nant/local.include b/.nant/local.include
index 5185717cbc..2339ce827b 100644
--- a/.nant/local.include
+++ b/.nant/local.include
@@ -43,6 +43,7 @@
   <delete dir="${distbindir}/Prebuild"/>
   <delete dir="${distbindir}/%temp%"/>
   <delete dir="${distbindir}/.nant"/>
+  <delete dir="${distbindir}/ThirdParty"/>
   <delete>
     <fileset basedir="${distbindir}">
       <include name="compile.bat"/>