ADDITIONAL SYSTEM INFORMATION :
Fedora 33
rpmbuild version 4.16.0

A DESCRIPTION OF THE PROBLEM :
When jpackage calls rpmbuild to generate rpm package it fails with the following error:
error: bare words are no longer supported, please use "...": "x/opt" != x
error: ^
error: /tmp/jdk.incubator.jpackage15887147244578094457/SPECS/main.spec:8: bad %if condition: "x/opt" != x


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https://gitlab.com/AngelForest/jpackage-test
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FREQUENCY : always