diff --git a/docker/image-builder/Dockerfile b/docker/image-builder/Dockerfile
index 6143417..2f9d60c 100644
--- a/docker/image-builder/Dockerfile
+++ b/docker/image-builder/Dockerfile
@@ -9,6 +9,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     parted dosfstools e2fsprogs kmod \
     initramfs-tools fdisk gdisk udev kpartx \
     xz-utils bzip2 zstd \
+    python3 \
     && rm -rf /var/lib/apt/lists/*
 
 # Install Go (Ubuntu 24.04 only has 1.22, distrobuilder needs newer)