Hi, I tried to build BirtualBox under Leap 15.6 using the command osc build -M kmp --alternative-project openSUSE:Leap:15.6:Staging:adi:1 standard The build installed the packages and ended with: Verifying integrity of cached packages using keys from SUSE:SLE-15-SP3:Update, SUSE:SLE-15:GA, SUSE:SLE-15-SP4:GA, SUSE:SLE-15:Update, SUSE:SLE-15-SP4:Update, SUSE:SLE-15-SP3:GA, SUSE:SLE-15-SP5:GA, SUSE:SLE-15-SP5:Update, SUSE:SLE-15-SP1:Update, SUSE:SLE-15-SP2:Update, SUSE:SLE-15-SP2:GA, SUSE:SLE-15-SP1:GA, openSUSE:Leap:15.6, openSUSE:Backports warning: /var/tmp/osbuild-packagecache/openSUSE:Backports:SLE-15-SP6/standard/x86_64/kbuild-0.1.9998svn3110-bp156.3.1.x86_64.rpm: Header V3 RSA/SHA512 Signature, key ID 25db7ae0: NOKEY /var/tmp/osbuild-packagecache/openSUSE:Backports:SLE-15-SP6/standard/x86_64/kbuild-0.1.9998svn3110-bp156.3.1.x86_64.rpm : public key not available Is there something wrong with the kbuild package in 15.6? Thanks, Larry