diff --git a/prebuild.xml b/prebuild.xml
index 77e536ad1f..258c898dfd 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -1651,9 +1651,6 @@
       <Reference name="OpenMetaverseTypes.dll"/>
       <Reference name="OpenMetaverse.StructuredData.dll"/>
       <Reference name="OpenMetaverse.dll"/>
-      <Reference name="IronPython.dll"/>
-      <Reference name="IronMath.dll"/>
-      <Reference name="PumaCode.SvnDotNet.dll" />
       <Reference name="OpenSim.Framework"/>
       <Reference name="OpenSim.Framework.Communications"/>
       <Reference name="OpenSim.Data" />