diff --git a/scripts/upgrade b/scripts/upgrade
index 0d90702..b0c4f00 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -137,8 +137,8 @@ then
 	pushd "$final_path"
 
 	ynh_use_nodejs
-	
-	yarn install --frozen-lockfile && ynh_exec_warn_less yarn run build
+	yarn install --frozen-lockfile
+	ynh_exec_warn_less yarn run build
 
 	popd 
 fi