Wine progress:

• You can download a full SBCL installer from their website, run wine on it, and then open a REPL via the resulting .exe

• *features* contains :WIN32 and neither :LINUX nor :UNIX

• If you wine ~/.wine/blahblah/sbcl.exe from outside the wine prefix and then ask it (uiop:getcwd), it tells you a path under Z: like Z:/home/colin/code/foobar/

• If you vend repl wine /home/colin/.wine/drive_c/Program\ Files/Steel\ Bank\ Common\ Lisp/sbcl.exe (using vend) it "just works" and you can load your systems.

• Loading systems produces messages like:

; compiling file "Z:/home/colin/code/common-lisp/filepaths/src/filepaths.lisp" (written 17 FEB 2025 06:14:11 AM):
; wrote C:/users/colin/AppData/Local/cache/common-lisp/sbcl-2.5.5-win-x64/Z/home/colin/code/common-lisp/filepaths/src/filepaths-tmpUX5S4ADN.fasl

• In emacs, you can add the following to sly-lisp-implementations and it will "just work":

  (sbcl-wine ("vend" "repl" "wine" "/home/colin/.wine/drive_c/Program Files/Steel Bank Common Lisp/sbcl.exe"))
  

• I'm able to load and test systems as usual from a normal Emacs session running in Linux, but the underlying SBCL thinks it's in Windows.

• The :device field of pathname finally matters:

The object is a PATHNAME.
0. NAMESTRING: "Z:/home/colin/code/common-lisp/filepaths/"
1. HOST: #<SB-IMPL::WIN32-HOST {1100039A13}>
2. DEVICE: "Z"
3. DIR+HASH: ((:ABSOLUTE "home" "colin" "code" "common-lisp" "filepaths")
              . 1436663681855573684)
4. NAME: NIL
5. TYPE: NIL
6. VERSION: NIL

Likewise, this shape of literal does what you expect: #p"Z:/foo" with Z as the device. Notice however that even on windows, the separator is a slash (not a backslash, thank god)

(@fosskers on Discord)

Does Wine work well? The Kandria game Windows version was built like this.