diff --git a/releng/maps/build.cfg b/releng/maps/build.cfg
index 37bbb2a..1f35d70 100644
--- a/releng/maps/build.cfg
+++ b/releng/maps/build.cfg
@@ -1,4 +1,6 @@
-wtpBuilderVersion=v200612160355
+wtpBuilderVersion=v200612161225
+
+#v200612160355
 
 # pre jem patch
 #v200612150145
diff --git a/releng/maps/dependencies.properties b/releng/maps/dependencies.properties
index 53c0cdf..f98dc8e 100644
--- a/releng/maps/dependencies.properties
+++ b/releng/maps/dependencies.properties
@@ -116,7 +116,7 @@
 # in our pre-req cache
 jempatch.url  = http://download.eclipse.org/tools/ve/downloads/drops/R-1.2.1-200609261748
 jempatch.releng.url = http://archive.eclipse.org/webtools/downloads/drivers
-jempatch.file = JEM-SDK-M20060918_wtp-patch-M4b.zip
+jempatch.file = JEM-SDK-M20060918_wtp-patch-M4c.zip
 jempatch.name = JEM 1.2.2 Patch
 jempatch.description = JEM 1.2.2 Patch