As mentioned above, everyone will be confused now.
https://hobbesarchive.com/Home/Download?path=/Hobbes/pub/os2/dev/proglang/cpp/OpenWatcom_C_2-0-1.exe mentioned as Program Contact: David Azarewicz
Unfortunately we do not see who uploaded this. But as Steven mentioned above he and Gregg needed a repo we can only guess if David used these or any other source. I fear David uses his own different repo. But I don't know. We have to ask the unknown uploader or David.
http://openwatcom.org/ftp/source/ow_portable_v2_test_build.zip seems to be a build by 'lys'. However is behind this nick he is hanging around at irc #watcom. I think lys cross-builds this from the 'official' perforce repo on his BSD machine. It seems to be not related to Jiris builds I think.
Lars, lys asked me to ask you to test the ow_portable_v2_test_build.zip build against the problem you know with the other watcom builds. No clue why he don't want to post here by himself or ask you directly.....