These two fields allow to specify a different default assignee for ticket opened against this package in bugzilla. Note: The EPEL field is always displayed for packages in the 'rpms' namespace regardless of whether it is used in bugzilla or not.
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Unset RUSTFLAGS to work around mozjs not supporting taking more than one flag https://src.fedoraproject.org/rpms/redhat-rpm-config/pull-request/243#comment-134252