diff --git a/build/repo.props b/build/repo.props
index c5d91e8a2c..de0440bdd2 100644
--- a/build/repo.props
+++ b/build/repo.props
@@ -1,5 +1,8 @@
 <Project>
   <ItemGroup>
+    <!-- required for the custom version of csc -->
+    <DotNetCoreRuntime Include="1.1.2" />
+
     <PackageLineup Include="Internal.AspNetCore.Universe.Lineup" Version="2.1.0-*" />
     <PackageLineup Include="Internal.AspNetCore.Partners.Lineup" Version="2.1.0-*" />
   </ItemGroup>