diff --git a/pkgs/by-name/cg/cgtcalc/package.nix b/pkgs/by-name/cg/cgtcalc/package.nix
index eae6cbd7e32e..c3720fb38c9e 100644
--- a/pkgs/by-name/cg/cgtcalc/package.nix
+++ b/pkgs/by-name/cg/cgtcalc/package.nix
@@ -45,7 +45,9 @@ stdenv.mkDerivation (finalAttrs: {
   # https://github.com/NixOS/nixpkgs/issues/379859
   doCheck = false;
 
-  passthru.updateScript = nix-update-script { };
+  passthru.updateScript = nix-update-script {
+    extraArgs = [ "--version=branch" ];
+  };
 
   meta = {
     description = "UK capital gains tax calculator written in Swift";