Setup.sh can't find libMonoPosixHelper.so in /usr/lib64

Doing first time installation from source, Setup.sh fails almost immediately with message:
Updating dependencies: 0% (0/17406)…
Failed to download ‘http://cdn.unrealengine.com/dependencies/2369826-2acd3c361c9d4a858bd63938a2ab980e/052ad62516b7d63eaf4c6410cd2dca0264734665’: /usr/lib/libMonoPosixHelper.so (DllNotFoundException)

My mono installation has its .so files in /usr/lib64, including libMonoPosixHelper.so but its not being found. Can I persuade Setup.sh (or whatever it is that is looking for this lib) to look in /usr/lib64 instead?

I’ve temporarily put sym links in /usr/lib to all the lib{Mm}ono files in /usr/lib64, which has enables Setup.sh to end in SUCCESS, however I don’t want to leave them there if possible - /usr/lib and /usr/lib64 are quite different on my distro (Slackware64).

Thanks for any tips on this,
chris

I’ve found the cause myself - for some reason my /etc/mono/config had an entry for MonoPosixHelper with a target explicitly (and wrongly) set to /usr/lib/libMonoPosixHelper.so instead of in /usr/lib64 where it and all other lib[M,m]ono* files are installed i.e. this is a local mono installation problem not a UE problem and can be marked as RESOLVED by whoever does that.

chris