nix-config/home/lf/cleaner.nix

{ config, pkgs, ... }:

let printf = "${pkgs.coreutils-full}/bin/printf";
in
pkgs.writeShellScript "lf-cleaner.sh" ''
  [ -n "$FIFO_UEBERZUG" ] && ${printf} '{"action": "remove", "identifier": "PREVIEW"}\n' > "$FIFO_UEBERZUG"
''