diff --git a/releng/org.eclipse.rse.build/nightly.sh b/releng/org.eclipse.rse.build/nightly.sh
index ae16b1f90ea..68928be5b26 100755
--- a/releng/org.eclipse.rse.build/nightly.sh
+++ b/releng/org.eclipse.rse.build/nightly.sh
@@ -59,6 +59,14 @@ if [ "$3" != "" ]; then
 fi
 rm -rf "${buildDirectory}"
 
+#default value of the bootclasspath attribute used in ant javac calls.  
+bootclasspath="/shared/dsdp/JDKs/win32/j2sdk1.4.2_19/jre/lib/rt.jar:/shared/dsdp/JDKs/j2sdk1.4.2_19/jre/lib/jsse.jar"
+bootclasspath_15="/shared/common/jdk-1.5.0_16/jre/lib/rt.jar"
+#bootclasspath_16="$builderDir/jdk/win32_16/jdk6/jre/lib/rt.jar"
+#bootclasspath_foundation="/shared/common/Java_ME_platform_SDK_3.0_EA/runtimes/cdc-hi/lib/rt.jar"
+bootclasspath_foundation11="/shared/dsdp/JDKs/win32/j9_cdc11/lib/jclFoundation11/classes.zip"
+
+
 command="java -cp ${basebuilder}/plugins/org.eclipse.equinox.launcher.jar org.eclipse.core.launcher.Main "
 command="$command -application org.eclipse.ant.core.antRunner "
 command="$command -buildfile ${pdeBuild}/scripts/build.xml "
@@ -77,6 +85,10 @@ if [ "$buildType" = "N" ]; then
   command="$command -DfetchTag=HEAD "
 fi
 command="$command -DdoPublish=true "
+command="$command -Dbootclasspath=${bootclasspath} "
+command="$command -DJ2SE-1.4=${bootclasspath} "
+command="$command -DJ2SE-1.5=${bootclasspath_15} "
+command="$command -DCDC-1.1/Foundation-1.1=${bootclasspath_foundation11} "
 #command="$command postBuild "
 
 echo "$command"