The 1.12.1 windows .zip files (https://github.com/Clozure/ccl/releases/download/v1.12.1/ccl-1.12.1-windowsx86.zip and https://github.com/Clozure/ccl/releases/download/v1.12.1/windowsx86.zip) seem to be using \ as path separator instead of / as required by zip spec.

This confuses the roswell (roswell/roswell#491), preventing it from installing current CCL. Might also be causing the problems with 7-zip mentioned in #385.

Microsoft tools extract it without complaint, and unzip with only a warning, so contents are probably otherwise OK and zip just needs to be rebuilt.