diff --git a/scripts/transform-site.sh b/scripts/transform-site.sh
index b1bda95..6d8549a 100755
--- a/scripts/transform-site.sh
+++ b/scripts/transform-site.sh
@@ -6,13 +6,16 @@ set -e # Exit on first error.
 
 cd "$(dirname "$0")/.."
 
-rm -rf web-serve
-mkdir web-serve
+mkdir web-serve-new
 
 for file in $(cd site; find -type f); do
     file="$(echo $file | sed -r 's/^\.\/?//')"
     dir="$(dirname $file)"
-    outdir="web-serve/$dir"
+    outdir="web-serve-new/$dir"
     mkdir -p "$outdir"
     ./scripts/transform-file.py "site/$file" "$outdir"
 done
+
+mv web-serve web-serve-old
+mv web-serve-new web-serve
+rm -rf web-serve-old