Hi, Andrea
After installing the debian-keyring package, no that issue. Thank you so much.
But I tried this under libvirt-8.5.0/
dpkg-buildpackage --no-sign
dpkg-checkbuilddeps: error: Unmet build dependencies: debhelper-compat (= 13) libc6-dev (>= 2.31-14~) meson (>= 0.54.0~) qemu-system-common:native
But my meson version is 0.63.0, which should satisfy this dependency requirement;
for the debhelper, libc6-dev, qemu-system-common, they are all the latest version as for I use apt install in the Ubuntu20 system, I do not know how to solve these dependency issues.
Plus, if I just add -d option in the dpkg-buildpackage command, it will still fail in the end.