diff --git a/prebuild.xml b/prebuild.xml
index 88bac3a..7ee2624 100644
--- a/prebuild.xml
+++ b/prebuild.xml
@@ -14,7 +14,7 @@
       <Reference name="System" localCopy="false"/>
       <Reference name="System.Xml"/>
       <Reference name="System.Drawing"/>
-	    <Reference name="log4net.dll" path="../../../bin"/>
+	    <Reference name="log4net.dll" path="../../../bin" Private="True" />
       <Reference name="Nini.dll" path="../../../bin"/>
       <Reference name="Mono.Addins.dll" path="../../../bin"/>
       <Reference name="OpenMetaverseTypes.dll" path="../../../bin"/>
@@ -31,9 +31,9 @@
       <Reference name="OpenSim.Server.Base" path="../../../bin"/>
       <Reference name="OpenSim.Data" path="../../../bin"/>
 
-      <Reference name="BouncyCastle.Crypto.dll" path="../"/>
-      <Reference name="MailKit.dll" path="../"/>
-      <Reference name="MimeKit.dll" path="../"/>
+      <Reference name="BouncyCastle.Crypto.dll" path="../" localCopy="True"/>
+      <Reference name="MailKit.dll" path="../" localCopy="True"/>
+      <Reference name="MimeKit.dll" path="../" localCopy="True"/>
 	<Files>
 		<Match pattern="*.cs" recurse="true"/>
 	</Files>