Code builder OpenCL 2.0 Unable to assign pipe variable

The following OpenCL 2.0 kernel compiles in code builder using the OpenCL code builder eclipse plug in.  But it does not seem possible to assign pipe to the variable out.

    __kernel void example (__write_only pipe uchar8 out)
    {
    }

When using the OpenCL kernel analysis input.   I select a pipe and receive the response:

Wrong variable type selected: Please select a variable from the right type (Buffers)