Error building slib-guile16

[Kurt Hillig]

I'm trying to install gnucash, and running into a problem with 
slib-guile16.

It looks like there's a bug in its installation script (makefile?  I'm new 
to this stuff), in that it tries to create a link that already exists, 
causing it to bomb:

   G5Q > sudo port install -f gnucash +guile16
   --->  Staging slib-guile16 into destroot
   Error: Target org.macports.destroot returned: could not create new link
   "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_slib-guile16/work/destroot//opt/local/share/guile/slib":
   that path already exists
   Error: The following dependencies failed to build: slib-guile16
   Error: Status 1 encountered during processing.

I've verified this by installing XCode and macports (the latest versions) on my 
brand new laptop and simply trying 'port install slib-guile16'; it builds the 
dependencies but then fails to install slib-guile16, giving the same error 
message.

As I said, I'm new to this stuff; if I knew where to look I might be able to 
fix it, but there are a lot of files to poke through and I don't really know 
what does what...

Advice would be greatly appreciated!

  > Computers were invented to help people waste more time faster <