diff --git a/pkgs/by-name/si/sidplayfp/package.nix b/pkgs/by-name/si/sidplayfp/package.nix
index bc7e32127c39..ee3921edd4fb 100644
--- a/pkgs/by-name/si/sidplayfp/package.nix
+++ b/pkgs/by-name/si/sidplayfp/package.nix
@@ -72,7 +72,7 @@ stdenv.mkDerivation (finalAttrs: {
     };
     updateScript = gitUpdater {
       rev-prefix = "v";
-      ignoredVersions = "(a|rc)$";
+      ignoredVersions = "(a|rc)";
     };
   };