[Pkg-libvirt-maintainers] gbp import-orig failure with libvirt source

[Vasudev Kamath]

Hi Team,

Was trying to import 6.4 version of libvirt but its failing with
following error. I'm doing import-orig with --uscan switch.

bp:info: Launching uscan...
gpgv: Signature made Tue 02 Jun 2020 02:01:26 PM IST
gpgv:                using RSA key DB46681BB91ADCEA170FA2D415588B26596BEA5D
gpgv: Good signature from "Daniel Veillard (Red Hat work email) <veillard at redhat.com>"
gpgv:                 aka "Daniel Veillard <Daniel.Veillard at w3.org>"
gbp:info: Using uscan downloaded tarball ../libvirt_6.4.0.orig.tar.xz
What is the upstream version? [6.4.0] 
gbp:info: Importing '../libvirt_6.4.0.orig.tar.xz' to branch 'upstream/latest'...
gbp:info: Source package is libvirt
gbp:info: Upstream version is 6.4.0
gbp:error: Import of ../libvirt_6.4.0.orig.tar.xz failed: Couldn't commit to 'pristine-tar' with upstream '5d1f17e4035e01548d006d598922650408f56703': pristine-xz failed to reproduce build of ../libvirt_6.4.0.orig.tar.xz
(Please file a bug report.)
pristine-tar: failed to generate delta
gbp:error: Error detected, Will roll back changes.
gbp:info: Rolling back branch upstream/latest by resetting it to dd9d74f17d067cc126d90b59d1a03349de3f756c
gbp:info: Rolling back branch pristine-tar by resetting it to 8d7ff7c11d0cd0585456477b5a145e24afd83f35
gbp:error: Rolled back changes after import error.

I'm on debian/experimental branch. Am I doing something wrong here?

Cheers,
Vasudev