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Description of problem:
createrepo_c in RHEL 8.2 cannot create DeltaRPMs of RPMs using zstd compression because drpm erroneously does not have zstd support enabled. Please enable it so that this isn't broken anymore.

Version-Release number of selected component (if applicable):
0.4.1-1.el8

How reproducible:
Always.

Additional info:
I've fixed the conditional in the upstream drpm spec with the following commit: https://github.com/rpm-software-management/drpm/commit/4f74624e6904a1855fb06f06793864946f1d3c77

test: https://github.com/rpm-software-management/ci-dnf-stack/pull/843

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (createrepo_c bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHEA-2020:4700