After 640709e7db054e90d5e6609eeb16a01af34b5a5a (from !1202) DOS mounted paths get translated to their real path instead of the mounted ones. Example: if `C:\path` is mounted as `X:` then `cmSystemTools::GetRealPath("X:\file.txt")` will return `C:\path\file.txt` instead of `X:\file.txt` as it did previously. Reverting 640709e7db054e90d5e6609eeb16a01af34b5a5a fixes the issue. Not sure what is the best solution for this, but we rely heavily on being able to mount paths as drives in Windows and this issue is blocking us to upgrade to 3.11