The Clover Runtime assembly provides the necessary support functions for instrumented code. To compile and run the instrumented code, the CloverRuntime.dll assembly must be added as a reference to the compilation process. The NAnt tasks and the Visual Studio plugin take care of this process automatically. for command line driven builds, such as when using make, you need to adjust your build process to include the runtime as a reference. The CloverRuntime assembly is available in the Clover.NET installation directory.