Freedesktop has apparently deprecated the Haskell bustle (pkgs.bustle) and rewritten it in Rust: https://gitlab.gnome.org/World/bustle. It'd be nice to package it and ideally replace pkgs.bustle with it since the haskell version has become difficult to keep working. (Is it a drop in replacement?)