(string-append "-DOPENVDB_INCLUDE_DIR="
			      (assoc-ref %build-inputs "openvdb")
                              "/lib")
               (string-append "-DOPENVDB_LIBRARY="
			      (assoc-ref %build-inputs "openvdb")
                              "/include")

	       (string-append "-DUSD_LIBRARY=" (assoc-ref %build-inputs "usd"))

               (string-append "-DPYTHON_LIBPATH=" (assoc-ref %build-inputs "python")

               (string-append "-DPYTHON_LIBPATH="
			      (assoc-ref %build-inputs "python")

               (string-append "-DPYTHON_INCLUDE_DIR=" (assoc-ref %build-inputs "python")

               (string-append "-DPYTHON_INCLUDE_DIR="
			      (assoc-ref %build-inputs "python")