Following the build instructions at Qubes ISO Building | Qubes OS the build fails with:
[SKIPPED] perl-Fedora-VSP-0.001-4.fc25.noarch.rpm: Already downloaded
[SKIPPED] perl-generators-1.10-1.fc25.noarch.rpm: Already downloaded
Package rpm-devel-126.96.36.199-5.fc25.x86_64.rpm is not signed
If I understand correctly we just built this package, it does not seem anormal to find it unsigned, what do I miss ?