diff --git a/build.sh b/build.sh
index 0b6ac97..8008d7f 100644
--- a/build.sh
+++ b/build.sh
@@ -1,20 +1,22 @@
 #! /bin/bash
 
 main() {
-   set -euo pipefail
+   set -eo pipefail
 
    d="$PWD"
    mkdir -p ./work.d
    cd ./work.d
    cleanup() {
       cd "$d"
-      rm -rf ./work.d || true
+      $DEBUG rm -rf ./work.d || true
    }
    trap cleanup EXIT
 
-   git clone \
-      https://github.com/fe80Grau/ytdlp2STRM.git \
-      --depth=1
+   if [ ! -d ytdlp2STRM ]; then
+      git clone \
+         https://github.com/fe80Grau/ytdlp2STRM.git \
+         --depth=1
+   fi
 }
 
 if [ "$0" == "$BASH_SOURCE" ]; then