🚀 go-pugleaf

I'm currently writing stuff on a symbolics which is (I hope!) portable
ANSI CL, and will eventually want to run elsewhere.  I've finally
given up and started using DEFSYSTEM because the support for it is so
nice.  I had tried using the MK portable defsystem but I found it was
a pain to compile because of PROVIDE/REQUIRE nausea so I gave up
without trying.  I'll probably go back to it in the end I suspect...

What I'd like to be able to do is take my system definitions from the
symbolics and use them on other CLs: does anyone know of anything
which will let me do that?  There are obvious issues with versioning
&c (I'd be happy with the newest versions) as well as patching.

What would be not quite so good would be to use SCT to construct lists
of files to compile & load from system definitions, which I can then
point other CLs at.  I kind of have this working but I'm not sure I
know what I'm doing (I'm using DEFINE-SYSTEM-OPERATION (? name)).
Does anyone have experience of that?

Thanks

--tim