anchor.diff:     (:proto-file "unittest"
       :proto-pathname "google-protobuf/src/google/protobuf/unittest"
       :depends-on ("unittest_import")
  -    :proto-search-path (#p"google-protobuf/src/"))
  +    :proto-search-path ("google-protobuf/src/"))
      ))
  
positive.code:     (make-pathname :directory (pathname-directory *load-truename*))
      "Directory containing the protobuf source code."))
  
  (defun resolve-relative-pathname (pathname)
    "When PATHNAME doesn't have an absolute directory component, treat it as
  relative to the protobuf source directory."
    (let ((directory (pathname-directory pathname)))
      (if (and (list directory) (eq (car directory) :absolute))
          pathname
          (merge-pathnames pathname *protobuf-directory*))))
  
negative.code: ;;; Teach ASDF how to convert protocol buffer definition files into Lisp.
  
  
  (defparameter *protoc* (resolve-relative-pathname "google-protobuf/src/protoc")
    "Pathname of the protocol buffer compiler.")
  
  (defclass proto-file (cl-source-file)
  