diff --git a/builder/stage4/04-pisdr-system/00-packages b/builder/stage4/04-pisdr-system/00-packages
index 9a84486..4e8a013 100644
--- a/builder/stage4/04-pisdr-system/00-packages
+++ b/builder/stage4/04-pisdr-system/00-packages
@@ -5,3 +5,4 @@ build-essential
 git
 pkg-config
 re2c
+ninja