[slime-devel] setting a different initial package in the REPL

Hello, I am starting Slime with a custom SBCL image, in which my code is all contained in a CL package which I have defined. So I would like the initial Slime REPL to open not in the CL-USER package, but in another one. I suppose I should use SLIME-REPL-SET-PACKAGE somehow, but where exactly should I put it? So far I haven't been able to obtain the desired effect. thanks, Giovanni