I tried to use CDR import on Windows with UniConvertor and found out that:
- you can only install UniConvertor into a separate installed Python, not into Inkscape's own Python,
- even if you do that, it won't work because Inkscape insists on using its own Python, even to the point of prepending it to the system PATH, so it is simply impossible to run the separate Python unless you know exactly where it is.
For these reasons, I decided that the best strategy would be to include a copy of UniConvertor to our Inkscape Python in devlibs, which I did. I think supporting CorelDraw formats out of the box is an important enough feature to justify a few extra megabytes to the distribution.
P.S. Inkscape on Windows compiles and runs fine, except for the missing icons.