In order to clean up fasls you can run on the Sly REPL the following command:
(slynk-asdf:delete-system-fasls :package-name)
I am using Slime and SBCL. How would you achieve the same using SLIME?
Thanks.
M-x slime-delete-system-fasls
or
(swank:delete-system-fasls :package-name)
edit: a third way, from the REPL, is to type a "comma" command: type ,
then delete-system-fasls
(completion is available).