From eb988de0e4f01d28087ba67e258a03438a7eef0c Mon Sep 17 00:00:00 2001
From: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
Date: Thu, 6 Nov 2025 13:44:06 +0900
Subject: [PATCH] Dockerfile: use ubuntu:<LTS>-<yyyyMMdd> for reproducibility

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
---
 Containerfile.cross | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Containerfile.cross b/Containerfile.cross
index 00aadf9..10ba064 100644
--- a/Containerfile.cross
+++ b/Containerfile.cross
@@ -5,7 +5,8 @@
 #   --platform=amd64,arm64,arm,s390x,ppc64le,riscv64 \
 #   -f Containerfile.cross .
 FROM --platform=$BUILDPLATFORM tonistiigi/xx:1.8.0 AS xx
-FROM --platform=$BUILDPLATFORM ubuntu:questing AS fuse-overlayfs
+# Use ubuntu:<LTS>-<yyyyMMdd> for reproducibility
+FROM --platform=$BUILDPLATFORM ubuntu:noble-20251001 AS fuse-overlayfs
 ADD --chmod=0755 \
   https://raw.githubusercontent.com/reproducible-containers/repro-sources-list.sh/v0.1.4/repro-sources-list.sh \
   /usr/local/bin/repro-sources-list.sh