diff --git a/oci-seccomp-bpf-hook.spec b/oci-seccomp-bpf-hook.spec
index a2bc40e..821b169 100644
--- a/oci-seccomp-bpf-hook.spec
+++ b/oci-seccomp-bpf-hook.spec
@@ -16,14 +16,14 @@
 %global git0 https://%{import_path}
 
 %global built_tag v1.2.6
-%global built_tag_strip 1.2.6
+%global built_tag_strip %(b=%{built_tag}; echo ${b:1})
 %global gen_version %(b=%{built_tag_strip}; echo ${b/-/"~"})
 
 # use the same arch definitions as present in the bcc package
 ExclusiveArch:  x86_64 %{power64} aarch64 s390x armv7hl
 
 Name: %{repo}
-Version: 1.2.6
+Version: %{gen_version}
 License: ASL 2.0 and BSD and ISC and MIT
 Release: %autorelease
 Summary: OCI Hook to generate seccomp json files based on EBF syscalls used by container