ToolsVersion 4

Author: spaghettidba

Setup/Setup.wixproj

@@ -1,10 +1,10 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <!--
   WiX v3 MSBuild project. Requires WiX Toolset v3.x to be installed.
   See https://wixtoolset.org/ to download WiX v3.
   For a standalone build (including harvesting), use buildmsi.ps1.
 -->
-<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">x86</Platform>
@@ -44,7 +44,7 @@
       harvest.wxs, harvest2.wxs and harvest3.wxs are generated by heat.exe
       in buildmsi.ps1. Run buildmsi.ps1 before building from Visual Studio.
     -->
-    <Compile Include="harvest.wxs"  Condition="Exists('harvest.wxs')"  />
+    <Compile Include="harvest.wxs" Condition="Exists('harvest.wxs')" />
     <Compile Include="harvest2.wxs" Condition="Exists('harvest2.wxs')" />
     <Compile Include="harvest3.wxs" Condition="Exists('harvest3.wxs')" />
   </ItemGroup>

SetupBootstrapper/SetupBootstrapper.wixproj

@@ -1,11 +1,11 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <!--
   WiX v3 MSBuild project. Requires WiX Toolset v3.x to be installed.
   See https://wixtoolset.org/ to download WiX v3.
   For a standalone build, use buildexe.ps1.
   The MSI (Setup project) must be built before building this bundle.
 -->
-<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">x86</Platform>