diff --git a/images/debian/12.1/Dockerfile b/images/debian/12.1/Dockerfile
index 767ba50..a5b8531 100644
--- a/images/debian/12.1/Dockerfile
+++ b/images/debian/12.1/Dockerfile
@@ -20,6 +20,7 @@ RUN apt-get update && apt-get install -y \
     buildah \
     cmake \
     ruby-full \
+    ruby-dev \
     libssl-dev \
     pkg-config