From 190728ab40ca90dd84fec8531640c78714df5492 Mon Sep 17 00:00:00 2001
From: Tim Wojtulewicz <tim@corelight.com>
Date: Fri, 28 Jul 2023 12:40:32 -0700
Subject: [PATCH] Force rebuild of windows CI image

---
 ci/windows/Dockerfile | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ci/windows/Dockerfile b/ci/windows/Dockerfile
index c91a3da262..a8ffae0d1e 100644
--- a/ci/windows/Dockerfile
+++ b/ci/windows/Dockerfile
@@ -3,6 +3,10 @@ FROM mcr.microsoft.com/dotnet/framework/sdk:4.8-windowsservercore-ltsc2019
 
 SHELL [ "powershell" ]
 
+# A version field to invalidatea Cirrus's build cache when needed, as suggested in
+# https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
+ENV DOCKERFILE_VERSION 20230728
+
 RUN Set-ExecutionPolicy Unrestricted -Force
 
 # Install Chocolatey