Unable to use costura fody with asp.net

Question

I have problems using costura fody with the latest build and standard small web services ( both asmx and wcf )

To test this. I build a simple asp.net project (hello world). I am using 2 simple class libraries as references.

[WebMethod] public string HelloWorld() 
{ 
   Class1 c1 = new Class1(); 
   Class2 c2 = new Class2(); 
   return c1.GetData() + c2.GetData(); 
} 

This is working fine without Costura/Fody

Adding latest version of Costura/Fody from github:

When I run it now I get compile errors saying DotNetCompilerPlatform missing :

type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
warningLevel="4" compilerOptions="/langversion:default /nowarn:1659;1699;1701"/>

The DotNetCompilerPlatform dll is part of the embedded dll's.

Why is this ?

Trying the same with a WCF service I encounter a simular problem.

Regards