tttool package on nixpkg broken

[GauiPower]

When trying to install tttool via nixpkg, the following error occurs: error: Package ‘tttool-1.8.1’ in /nix/store/cm6w0m72agl0jmixkbjv4fk2mb3wvps8-nixos-24.05/nixos/pkgs/development/haskell-modules/hackage-packages.nix:311798 is marked as broken, refusing to evaluate.
If you bypass the error with “export NIXPKGS_ALLOW_BROKEN=1”, the following error occurs: Error: Setup: Encountered missing or private dependencies: ...

[nomeata]

I am not sure if the tttool in nixpkgs is actively supported; essentially every haskell package is listed there, so just the existence of the package doesn’t mean it is expected to work.

I suggest to use the release, or (if you are adventurous) use the nix setup in this repository.