sdk: dotnet build fails with COM exception on Win7

You can use the code under https://github.com/aspnet/dnx-watch

C:\Users\victorhu\dev\dnx-watch\src\Microsoft.DotNet.Watcher.Core>dotnet build
Compiling Microsoft.DotNet.Watcher.Core for DNXCore,Version=v5.0
C:\Users\victorhu\AppData\Local\Microsoft\dotnet\cli\bin\dotnet.exe compile-csc @C:\Users\victorhu\dev\dnx-watch\src\Microsoft.DotNet.Watcher.Core\obj\Debug\dnx
core50\dotnet-compile.rsp returned Exit Code 1
C:\Users\victorhu\dev\dnx-watch\src\Microsoft.DotNet.Watcher.Core\error CS0041: Unexpected error writing debug information -- 'Unable to cast COM object of type
 'System.__ComObject' to interface type 'Microsoft.Cci.ISymUnmanagedWriter5'. This operation failed because the QueryInterface call on the COM component for the
 interface with IID '{DCF7780D-BDE9-45DF-ACFE-21731A32000C}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002
(E_NOINTERFACE)).'

Compilation failed.
    0 Warning(s)
    1 Error(s)

Time elapsed 00:00:03.4682894