diff --git a/tools/buildgen/generate_build_additions.sh b/tools/buildgen/generate_build_additions.sh
new file mode 100644
index 00000000000..44fc2558fa5
--- /dev/null
+++ b/tools/buildgen/generate_build_additions.sh
@@ -0,0 +1,38 @@
+#!/bin/sh
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+gen_build_json_dirs="test/core/end2end test/core/bad_client"
+gen_build_files=""
+for gen_build_json in $gen_build_json_dirs
+do
+  output_file=`mktemp /tmp/genXXXXXX`
+  $gen_build_json/gen_build_json.py > $output_file
+  gen_build_files="$gen_build_files $output_file"
+done
diff --git a/tools/buildgen/generate_projects.sh b/tools/buildgen/generate_projects.sh
index d896380c374..53998677465 100755
--- a/tools/buildgen/generate_projects.sh
+++ b/tools/buildgen/generate_projects.sh
@@ -38,19 +38,12 @@ fi
 
 cd `dirname $0`/../..
 mako_renderer=tools/buildgen/mako_renderer.py
-gen_build_json_dirs="test/core/end2end test/core/bad_client"
 
 if [ "x$TEST" != "x" ] ; then
   tools/buildgen/build-cleaner.py build.json
 fi
 
-gen_build_files=""
-for gen_build_json in $gen_build_json_dirs
-do
-  output_file=`mktemp /tmp/genXXXXXX`
-  $gen_build_json/gen_build_json.py > $output_file
-  gen_build_files="$gen_build_files $output_file"
-done
+. tools/buildgen/generate_build_additions.sh
 
 global_plugins=`find ./tools/buildgen/plugins -name '*.py' |
   sort | grep -v __init__ | awk ' { printf "-p %s ", $0 } '`