1 files changed, 4 insertions, 1 deletions
diff --git a/pkgs/development/tools/parsing/re2c/default.nix b/pkgs/development/tools/parsing/re2c/default.nix
index 311be4ccdc29a..f06a2b5424ef1 100644
--- a/pkgs/development/tools/parsing/re2c/default.nix
+++ b/pkgs/development/tools/parsing/re2c/default.nix
@@ -35,7 +35,10 @@ stdenv.mkDerivation rec {
   '';
 
   passthru = {
-    updateScript = nix-update-script { };
+    updateScript = nix-update-script {
+      # Skip non-release tags like `python-experimental`.
+      extraArgs = [ "--version-regex" "([0-9.]+)" ];
+    };
     tests = {
       inherit ninja php spamassassin;
     };