Picking up pre-release candidates even when branch is specified

[stephen-huan]

For sioyek nix-update is generating an update (NixOS/nixpkgs#358123) that changes the unstable version 2.0.0-unstable-2024-09-29 (tracking the development) branch to the pre-release candidate sioyek3-alpha0-unstable-2025-01-06. This happens even though the branch is explicitly specified with --version branch=development.

passthru.updateScript = nix-update-script {
  extraArgs = [
    "--version"
    "branch=development"
  ];
};

I would like nix-update to track only commits to the development branch and ignore releases/tags (since the base version is not an accurate reflection of the unstable version). Is there a way to tell nix-update this?

Perhaps related to #221, #246 but simpler because we don't need to determine whether a release is pre-release, just ignore all releases/tags entirely since we get the version information from the branch.

cf. #221, #246, #11, #263.