From 2306122787495f3fa4b1e774dac79c225e067e83 Mon Sep 17 00:00:00 2001
From: Neil Alexander <neilalexander@users.noreply.github.com>
Date: Thu, 28 Nov 2019 00:02:29 +0000
Subject: [PATCH] Allow upgrades (hopefully)

---
 contrib/msi/build-msi.sh | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/contrib/msi/build-msi.sh b/contrib/msi/build-msi.sh
index ada543cc..72d61070 100644
--- a/contrib/msi/build-msi.sh
+++ b/contrib/msi/build-msi.sh
@@ -98,6 +98,15 @@ cat > wix.xml << EOF
       Platform="${PKGARCH}"
       SummaryCodepage="1252" />
 
+    <Upgrade Id="${PKGGUID}">
+      <UpgradeVersion
+        Minimum="0.0.0.0"
+        Maximum="99.0.0.0"
+        Property="PREVIOUSVERSIONSINSTALLED"
+        IncludeMinimum="yes"
+        IncludeMaximum="no" />
+    </Upgrade>
+
     <Media
       Id="1"
       Cabinet="Media.cab"