From b3137f7d37f6e7b4a10b3ba8a8ba3f1c6f83ddb0 Mon Sep 17 00:00:00 2001
From: Pierre-Olivier Mercier <nemunaire@nemunai.re>
Date: Fri, 15 May 2026 22:05:26 +0800
Subject: [PATCH] fix(docker): explicitly install Mail::DKIM on arm64 builds

On arm64, cpanm does not automatically resolve Mail::DKIM as a
transitive dependency of Mail::Milter::Authentication, causing the
build to fail. Install it explicitly before Mail::Milter::Authentication.
---
 Dockerfile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Dockerfile b/Dockerfile
index 4568784..cdd15ed 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -75,6 +75,7 @@ RUN echo "@edge https://dl-cdn.alpinelinux.org/alpine/edge/community" >> /etc/ap
     ln -s /usr/bin/ld /bin/ld
 
 RUN cpanm --notest Mail::SPF && \
+    cpanm --notest Mail::DKIM && \
     cpanm --notest Mail::Milter::Authentication
 
 RUN wget https://download.savannah.nongnu.org/releases/spamass-milt/spamass-milter-0.4.0.tar.gz && \