{
  description = "A flake that provides a set of useful helper functions";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
  };

  outputs = { self, nixpkgs }: {
    mkIfElse = with nixpkgs.lib; p: yes: no: mkMerge [
      (mkIf p yes)
      (mkIf (!p) no)
    ];

    mkSymlinkActivationScript = {target, source, isDir ? false}: ''
      if [ ${if isDir then "-d" else "-f"} ${target} ]; then
        rm${if isDir then " -rf" else ""} ${target}
      fi
      ln -s ${source} ${target}
    '';

    attrByStrPath = strPath: set: nixpkgs.lib.attrsets.attrByPath (nixpkgs.lib.strings.splitString "." strPath) null set;
  };
}