On Fri, Oct 20, 2017 at 11:24 AM Sudarshan S Chawathe <xxxxxx@eip10.org> wrote:
 
  (import (except (scheme base)
                  vector-copy vector-copy! vector-append
                  vector-map vector-for-each
                  vector-fill!
                  vector->list list->vector
                  vector->string string->vector))

The vector.sld file deliberately doesn't export any of those names, so that the (scheme base) versions, which are often implemented more efficiently, will be used instead.  I'm not sure why you are seeing these conflicts.

-- 
John Cowan          http://vrici.lojban.org/~cowan        xxxxxx@ccil.org
The internet is a web of tiny tyrannies giving an illusion of anarchy.
                --David Rush