diff --git a/build.sh b/build.sh
index 4a32291..0853d1c 100755
--- a/build.sh
+++ b/build.sh
@@ -29,9 +29,10 @@ docker run -v "$(pwd)/Generated:/app/Generated" \
 
 if [ "$BTCPAYGEN_REVERSEPROXY" == "nginx" ]; then
     cp Production/nginx.tmpl Generated/nginx.tmpl
-    chmod +x Generated/pull-images.sh
 fi
 
+[[ -f "Generated/pull-images.sh" ]] && chmod +x Generated/pull-images.sh
+
 if [ "$BTCPAYGEN_REVERSEPROXY" == "traefik" ]; then
     cp Traefik/traefik.toml Generated/traefik.toml
     :> Generated/acme.json