diff --git a/tools/check_builds.sh b/tools/check_builds.sh
old mode 100755
new mode 100644
index 599aafa..fd380dd
--- a/tools/check_builds.sh
+++ b/tools/check_builds.sh
@@ -40,6 +40,7 @@
     while [ -n "$1" ]
     do
         rm -rf $TEST_BUILD_DIR/$PREFIX-$1
+        make PRODUCT-$(echo $1 | sed "s/-.*//" )-installclean
         make -j6 PRODUCT-$1 dist DIST_DIR=$TEST_BUILD_DIR/$PREFIX-$1
         if [ $? -ne 0 ] ; then
             echo FAILED
@@ -74,3 +75,18 @@
     compare_builds "$@"
 }
 
+function diff_builds
+{
+    local inputs=
+    while [ -n "$1" ]
+    do
+        diff $TEST_BUILD_DIR/golden-$1/installed-files.txt $TEST_BUILD_DIR/dist-$1/installed-files.txt &> /dev/null
+        if [ $? != 0 ]; then
+            echo =========== $1 ===========
+            diff $TEST_BUILD_DIR/golden-$1/installed-files.txt $TEST_BUILD_DIR/dist-$1/installed-files.txt
+        fi
+        shift
+    done
+    build/tools/compare_fileslist.py $inputs > $TEST_BUILD_DIR/sizes.html
+}
+