There is another interim option to allow access to a working older package for specific platforms in cases like these - add it to pkgrsc-wip (I wonder in fact if this should not be explicitly mentioned somewhere in the docs).
Ensure the package COMMENT and DESCR state clearly why it is there as an older version, and probably name the directory tigervnc113
It doesn't help getting a fix, but may make like a little easier in the meantime
David