fix(pkg): build dkms kvm from 7.2.9 and pin to the exact release

packaging/vfio-native-kvm-dkms/dkms.conf

@@ -1,8 +1,9 @@
 PACKAGE_NAME="vfio-native-kvm"
 PACKAGE_VERSION="@PKGVER@"
-# 7.2.3's KVM sources build against 7.2.x headers only; refuse anything else
-# loudly instead of producing a module that will not load.
-BUILD_EXCLUSIVE_KERNEL="^7\.2\."
+# The KVM sources are this exact kernel release's. Stable updates move KVM
+# declarations between the headers and arch/x86/kvm, so any other release
+# either fails to build or silently builds stale KVM code; refuse it.
+BUILD_EXCLUSIVE_KERNEL="^${PACKAGE_VERSION//./\\.}-"
 MAKE[0]="make -C /usr/lib/modules/${kernelver}/build M=${dkms_tree}/${PACKAGE_NAME}/${PACKAGE_VERSION}/build/arch/x86/kvm modules"
 BUILT_MODULE_NAME[0]="kvm"
 BUILT_MODULE_LOCATION[0]="arch/x86/kvm"