You don't have to import current-thread from srfi-18, it's already in top-level. But if you really need it, you have to use @@ for this un-exported symbol.
On Thu, 2014-02-27 at 09:14 +0800, Xin Wang wrote: > When try to import current-thread from srfi-18, guile fails with: > > ERROR: no binding `current-thread' in module (srfi srfi-18) > > It seems that current-thread need to be re-exported?