diff --git a/pkgs/by-name/ma/matrix-authentication-service/package.nix b/pkgs/by-name/ma/matrix-authentication-service/package.nix
index fb020bde47ad..3379e7f2efe9 100644
--- a/pkgs/by-name/ma/matrix-authentication-service/package.nix
+++ b/pkgs/by-name/ma/matrix-authentication-service/package.nix
@@ -88,7 +88,13 @@ rustPlatform.buildRustPackage (finalAttrs: {
   nativeInstallCheckInputs = [ versionCheckHook ];
   versionCheckProgramArg = "--version";
   doInstallCheck = true;
-  passthru.updateScript = nix-update-script { };
+  passthru.updateScript = nix-update-script {
+    extraArgs = [
+      # avoid unstable pre‐releases
+      "--version-regex"
+      "^v([0-9.]+)$"
+    ];
+  };
 
   meta = {
     description = "OAuth2.0 + OpenID Provider for Matrix Homeservers";