[slime-devel] C-c C-k with external-format latin

Hello, I have a file containing german "umlaute", which I can load with SBCL using (load "name.lisp" :external-format :latin-1) However C-c C-k yields decoding error on stream #<SB-SYS:FD-STREAM for "file /home/neuss/Programming/lisp/stundenplan.lisp" {1002304EE1}> (:EXTERNAL-FORMAT :UTF-8): the octet sequence (246 114 115 97) cannot be decoded. [Condition of type SB-INT:STREAM-DECODING-ERROR] How can I make C-c C-k (slime-compile-and-load-file) use an external format of :latin-1? Thank you, Nicolas