diff --git a/releng/org.eclipse.cdt.releng/build.xml b/releng/org.eclipse.cdt.releng/build.xml
index 6e59158103b..5c653824af9 100644
--- a/releng/org.eclipse.cdt.releng/build.xml
+++ b/releng/org.eclipse.cdt.releng/build.xml
@@ -54,12 +54,14 @@
 		<ant antfile="build.xml" dir="${pde.build.scripts}" target="preBuild">
 			<property name="builder" value="${basedir}/gdbjtag"/>
 		</ant>
+		<!--
 		<ant antfile="build.xml" dir="${pde.build.scripts}" target="preBuild">
 			<property name="builder" value="${basedir}/c99"/>
 		</ant>
 		<ant antfile="build.xml" dir="${pde.build.scripts}" target="preBuild">
 			<property name="builder" value="${basedir}/upc"/>
 		</ant>
+		-->
 		<ant antfile="build.xml" dir="${pde.build.scripts}" target="preBuild">
 			<property name="builder" value="${basedir}/xlc"/>
 		</ant>
@@ -72,12 +74,14 @@
 		<ant antfile="build.xml" dir="${pde.build.scripts}" target="fetch">
 			<property name="builder" value="${basedir}/gdbjtag"/>
 		</ant>
+		<!--
 		<ant antfile="build.xml" dir="${pde.build.scripts}" target="fetch">
 			<property name="builder" value="${basedir}/c99"/>
 		</ant>
 		<ant antfile="build.xml" dir="${pde.build.scripts}" target="fetch">
 			<property name="builder" value="${basedir}/upc"/>
 		</ant>
+		-->
 		<ant antfile="build.xml" dir="${pde.build.scripts}" target="fetch">
 			<property name="builder" value="${basedir}/xlc"/>
 		</ant>
@@ -356,6 +360,7 @@
 		<antcall target="tagone">
 			<param name="tagmodule" value="org.eclipse.cdt/jtag/org.eclipse.cdt.debug.gdbjtag-feature"/>
 		</antcall>
+		<!--
 		<antcall target="tagone">
 			<param name="tagmodule" value="org.eclipse.cdt/c99/org.eclipse.cdt.core.parser.c99"/>
 		</antcall>
@@ -368,6 +373,7 @@
 		<antcall target="tagone">
 			<param name="tagmodule" value="org.eclipse.cdt/upc/org.eclipse.cdt.core.parser.upc.feature"/>
 		</antcall>
+		-->
 		<antcall target="tagone">
 			<param name="tagmodule" value="org.eclipse.cdt/xlc/org.eclipse.cdt.managedbuilder.xlc.ui"/>
 		</antcall>
diff --git a/releng/org.eclipse.cdt.releng/buildindex.html b/releng/org.eclipse.cdt.releng/buildindex.html
index 8e18940aecb..3f92499ff98 100644
--- a/releng/org.eclipse.cdt.releng/buildindex.html
+++ b/releng/org.eclipse.cdt.releng/buildindex.html
@@ -22,8 +22,10 @@ you want to install. You will at nead require the C/C++ Development Tooling feat
 <li>CDT SDK Feature - superset of runtime that adds source and extension point schemas</li>
 <li>GDB Hardware Debugging - Provides a launch configuration for launching gdb to do hardware debugging.</li>
 <li>XL C/C++ Compiler Support - Provides an error parser and managed build support for IBM's XL C/C++ compilers.</li>
+<!--
 <li>ISO C99 Support - Provides a parser for the ISO/IEC 9899:1999 variant of the C programming language (aka C99), generated from a grammar using the LPG parser generator.  The grammar can be reused and extended to create your own parser for variants on the C programming language.</li>
 <li>Unified Parallel C Support - Provides support for the Unified Parallel C programming langugage.  Provides parsing/indexing infrastructure and language definition, allowing the UPC language to be recognized by CDT.  Requires the C99 parser feature.</li>
+-->
 <li>CDT Testing Feature - includes all test plugins required for running automated JUnit tests</li>
 </ul>
 </body>