diff --git a/aardvark-dns.spec b/aardvark-dns.spec
index 7bf0c6f..3a669bf 100644
--- a/aardvark-dns.spec
+++ b/aardvark-dns.spec
@@ -4,18 +4,20 @@
 # debuginfo doesn't work yet
 %global debug_package %{nil}
 
-%global built_tag_strip 1.2.0
+%global built_tag v1.2.0
+%global built_tag_strip %(b=%{built_tag}; echo ${b:1})
+%global gen_version %(b=%{built_tag_strip}; echo ${b/-/"~"})
 
 Name: aardvark-dns
-Version: 1.2.0
+Version: %{gen_version}
 License: ASL 2.0 and BSD and MIT
 Release: %autorelease
 ExclusiveArch: %{rust_arches}
 Summary: Authoritative DNS server for A/AAAA container records
 URL: https://github.com/containers/%{name}
 # Tarballs fetched from upstream's release page
-Source0: %{url}/archive/v%{built_tag_strip}.tar.gz
-Source1: %{url}/releases/download/v%{built_tag_strip}/%{name}-v%{built_tag_strip}-vendor.tar.gz
+Source0: %{url}/archive/%{built_tag}.tar.gz
+Source1: %{url}/releases/download/%{built_tag}/%{name}-%{built_tag}-vendor.tar.gz
 BuildRequires: cargo
 BuildRequires: git-core
 BuildRequires: make