> ;io-error open-input-file: can't open extensions.scm, /usr/lib64/snd/scheme/ws.scm[5] ws.scm loads extensions.scm, perhaps unnecessarily. You need to add extensions.scm's path to *load-path*: (set! *load-path* (cons "/usr/lib64/snd/scheme" *load-path*)) Perhaps s7 or Snd should do this automatically?