lib.pipe: Avoid creating scopes

     of the next function, and the last function returns the

     final value.

  */

  pipe = val: functions:

    let reverseApply = x: f: f x;

    in builtins.foldl' reverseApply val functions;

  pipe = builtins.foldl' (x: f: f x);

  # note please don’t add a function like `compose = flip pipe`.

  # This would confuse users, because the order of the functions