Hi Ricardo, > worker error: (keyword-argument-error #f Unrecognized keyword () > (#:positions?)) Oops! It looks like I have been working with some unpublished guile-xapian code. I have pushed those guile-xapian commits, released guile-xapian 0.3.0 and updated the Guix guile-xapian package. Hopefully, it should work now. Could you try again? Thanks, Arun