This bug was fixed in the package dpkg - 1.20.9ubuntu2
--------------- dpkg (1.20.9ubuntu2) impish; urgency=medium
* build: Switch default dpkg-deb compression from xz to zstd. (LP: #1923845) Keep compressing dpkg.deb with xz to help bootstrapping on non-Ubuntu systems.
-- Balint Reczey <email address hidden> Mon, 14 Jun 2021 16:04:10 +0200
This bug was fixed in the package dpkg - 1.20.9ubuntu2
---------------
dpkg (1.20.9ubuntu2) impish; urgency=medium
* build: Switch default dpkg-deb compression from xz to zstd. (LP: #1923845)
Keep compressing dpkg.deb with xz to help bootstrapping on non-Ubuntu
systems.
-- Balint Reczey <email address hidden> Mon, 14 Jun 2021 16:04:10 +0200