diff --git a/slirp4netns.spec b/slirp4netns.spec
index 9f70358..253d657 100644
--- a/slirp4netns.spec
+++ b/slirp4netns.spec
@@ -1,9 +1,9 @@
 %global built_tag v1.2.0
-%global built_tag_strip %(b=%{built_tag}; echo ${b:1})
+%global built_tag_strip 1.2.0
 %global gen_version %(b=%{built_tag_strip}; echo ${b/-/"~"})
 
 Name: slirp4netns
-Version: %{gen_version}
+Version: 1.2.0
 Release: %autorelease
 License: GPLv2
 Summary: slirp for network namespaces