[racket] Top-level R6RS libraries

Hello,

If I put this R6RS library:

#!r6rs

(library (xyz abc)

  (export abc)

  (import (rnrs))

  (define abc 10))

in the file '~/scheme/xyz/abc.sls', Racket can find it.

However, if I put this library:

#!r6rs

(library (abc)

  (export abc)

  (import (rnrs))

  (define abc 10))

in the file '~/scheme/abc.sls', Racket doesn't seem to find it.

My PLTCOLLECTS is:

~ $ echo $PLTCOLLECTS 
/usr/racket/collects:/home/dharmatech/scheme

The other R6RS implementations are able to pick up '(abc)' in the
top-level location.

Ed