From 05b350961cd29aec597c156298bd378cdc0e91ba Mon Sep 17 00:00:00 2001
From: "Raghu Shantha [MSFT]" <raghus@microsoft.com>
Date: Tue, 12 Jul 2016 15:37:40 -0700
Subject: [PATCH] Add ability to perform SxS install in MSI package manifest

---
 build.psm1 | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/build.psm1 b/build.psm1
index e868767f3..41021dde6 100644
--- a/build.psm1
+++ b/build.psm1
@@ -556,7 +556,10 @@ Built upon .NET Core, it is also a C# REPL.
     Write-Verbose "Packaging $Source"
 
     if ($IsWindows) {
-        $msiPackagePath = New-MSIPackage -ProductSourcePath $Source -ProductVersion $Version -AssetsPath "$PSScriptRoot\Assets"
+        
+        # Product Guid needs to be unique for every PowerShell version to allow SxS install
+        $productGuid = [guid]::NewGuid()
+        $msiPackagePath = New-MSIPackage -ProductSourcePath $Source -ProductVersion $Version -AssetsPath "$PSScriptRoot\Assets" -ProductGuid $productGuid
         $appxPackagePath = New-AppxPackage -PackageVersion $Version -SourcePath $Source -AssetsPath "$PSScriptRoot\Assets"
 
         $packages = @($msiPackagePath, $appxPackagePath)