diff --git a/deploy.firebase.sh b/deploy.firebase.sh
index 194d4e2..4a38fa3 100755
--- a/deploy.firebase.sh
+++ b/deploy.firebase.sh
@@ -12,7 +12,11 @@ if tty && ! which firebase; then
 fi
 which firebase
 
-outdir=./deploy
+outdir=$(mktemp -d)
+cleanup() {
+   rm -rf "$outdir"
+}
+trap cleanup EXIT
 
 rm -rf $outdir
 mkdir -p $outdir/public