Hello,
in my Wix/Paraffin Experiments I use the "alias" parameter because I work on different computers with different drive configuration. I encountered the problem that since I introduced the alias parameter all my settings with "dirExclude" are ignored. A workaround with "regexexclude" also failed.
The parameters are not even mentioned in the leading comments of every wxs file, so it seems it is a bug when interpreting the parameters.
regards,
HH