diff --git a/build/Modules/Umbraco.Build/Umbraco.Build.psm1 b/build/Modules/Umbraco.Build/Umbraco.Build.psm1
index e07d9019a4..9cbf008fd6 100644
--- a/build/Modules/Umbraco.Build/Umbraco.Build.psm1
+++ b/build/Modules/Umbraco.Build/Umbraco.Build.psm1
@@ -239,6 +239,7 @@ function Compile-Tests
     /t:Build `
     /tv:$toolsVersion `
     /p:UmbracoBuild=True `
+    /p:NugetPackages=$src\packages `
     > $tmp\msbuild.tests.log
     
   # /p:UmbracoBuild tells the csproj that we are building from PS
diff --git a/src/Umbraco.Core/Umbraco.Core.csproj b/src/Umbraco.Core/Umbraco.Core.csproj
index 74a903d6b0..5ad6d75802 100644
--- a/src/Umbraco.Core/Umbraco.Core.csproj
+++ b/src/Umbraco.Core/Umbraco.Core.csproj
@@ -66,6 +66,7 @@
     <PackageReference Include="Microsoft.AspNet.Identity.Owin" Version="2.2.1" />
     <PackageReference Include="Microsoft.Owin.Security.Cookies" Version="3.1.0" />
     <PackageReference Include="Microsoft.Owin.Security.OAuth" Version="3.1.0" />
+    <PackageReference Include="Microsoft.Web.Xdt" Version="2.1.1" />
     <PackageReference Include="MiniProfiler" Version="3.2.0.157" />
     <PackageReference Include="MySql.Data" Version="6.9.9" />
     <PackageReference Include="Newtonsoft.Json" Version="10.0.3" />
diff --git a/src/Umbraco.Tests/Umbraco.Tests.csproj b/src/Umbraco.Tests/Umbraco.Tests.csproj
index dd3bc2a984..330d634b83 100644
--- a/src/Umbraco.Tests/Umbraco.Tests.csproj
+++ b/src/Umbraco.Tests/Umbraco.Tests.csproj
@@ -29,7 +29,7 @@
     <UseApplicationTrust>false</UseApplicationTrust>
     <BootstrapperEnabled>true</BootstrapperEnabled>
     <TargetFrameworkProfile />
-    <NugetPackagesDirectory Condition="$(NugetPackagesDirectory) == '' Or $(NugetPackagesDirectory) == '*Undefined*'">$(SolutionDir)\packages</NugetPackagesDirectory>
+    <NugetPackages Condition="$(NugetPackages) == '' Or $(NugetPackages) == '*Undefined*'">$(SolutionDir)\packages</NugetPackages>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -672,8 +672,8 @@
     </PostBuildEvent>
   </PropertyGroup>
   <PropertyGroup>
-    <PreBuildEvent>xcopy "$(NugetPackagesDirectory)"\SqlServerCE.4.0.0.1\amd64\*.* "$(TargetDir)amd64\" /Y /F /E /I /C /D
-xcopy "$(NugetPackagesDirectory)"\SqlServerCE.4.0.0.1\x86\*.* "$(TargetDir)x86\" /Y /F /E /I /C /D</PreBuildEvent>
+    <PreBuildEvent>xcopy "$(NugetPackages)\SqlServerCE.4.0.0.1\amd64\*.*" "$(TargetDir)amd64\" /Y /F /E /I /C /D
+xcopy "$(NugetPackages)\SqlServerCE.4.0.0.1\x86\*.*" "$(TargetDir)x86\" /Y /F /E /I /C /D</PreBuildEvent>
   </PropertyGroup>
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it.
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/src/Umbraco.Web/Umbraco.Web.csproj b/src/Umbraco.Web/Umbraco.Web.csproj
index 050cab8d3d..c6d46458ae 100644
--- a/src/Umbraco.Web/Umbraco.Web.csproj
+++ b/src/Umbraco.Web/Umbraco.Web.csproj
@@ -92,6 +92,7 @@
     <PackageReference Include="Microsoft.Owin.Security.Cookies" Version="3.1.0" />
     <PackageReference Include="Microsoft.Owin.Security.OAuth" Version="3.1.0" />
     <PackageReference Include="Microsoft.Web.Infrastructure" Version="1.0.0" />
+    <PackageReference Include="Microsoft.Web.Xdt" Version="2.1.1" />
     <PackageReference Include="MiniProfiler" Version="3.2.0.157" />
     <PackageReference Include="Newtonsoft.Json" Version="10.0.3" />
     <PackageReference Include="NPoco" Version="3.5.1" />