diff --git a/build/NetFX.props b/build/NetFX.props
index 4d2841714b..ed5cb6dd69 100644
--- a/build/NetFX.props
+++ b/build/NetFX.props
@@ -1,11 +1,7 @@
-<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <PropertyGroup Condition=" '$(TargetFramework)' == 'net461' and '$(OS)' == 'Unix' ">
-    <FrameworkPathOverride>/usr/lib/mono/4.6.1-api</FrameworkPathOverride>
-    <FrameworkPathOverride Condition="$([MSBuild]::IsOsPlatform('OSX'))">/Library/Frameworks/Mono.framework/Versions/Current/lib/mono/4.6.1-api</FrameworkPathOverride>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(TargetFramework)' == 'net47' and '$(OS)' == 'Unix' ">
-    <FrameworkPathOverride>/usr/lib/mono/4.7-api/</FrameworkPathOverride>
-    <FrameworkPathOverride Condition="$([MSBuild]::IsOsPlatform('OSX'))">/Library/Frameworks/Mono.framework/Versions/Current/lib/mono/4.7-api</FrameworkPathOverride>
-  </PropertyGroup>
+<Project>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.0-preview.2" PrivateAssets="All" />
+  </ItemGroup>
 
 </Project>