An Overview of YueScript failed to run

The sample code from https://yuescript.org/doc/#an-overview-of-yuescript:

-- import syntax
import "yue" as :p, :to_lua

-- object literals
inventory =
  equipment:
    * "sword"
    * "shield"
  items:
    * name: "potion"
      count: 10
    * name: "bread"
      count: 3

-- pipe operator
[1, 2, 3]
  |> map (x) -> x * 2
  |> filter (x) -> x > 4
  |> reduce 0, (a, b) -> a + b
  |> print

-- metatable manipulation
apple =
  size: 15
  <index>:
    color: 0x00ffff

with apple
  p .size, .color, .<index> if .<>?

-- js-like export syntax
export 🌛 = "月之脚本"

yue -e test.yue

test.yue:16: attempt to call a nil value (global 'map')
Stack Traceback
===============
(1) global C function 'xpcall'
(2) '=(yuescript)':110

Start with the “An Overview of YueScript” sample at the linked documentation page and reproduce it from test.yue using yue -e test.yue. Determine why the pipe example reaches a nil global map; done means the documented sample runs without that error, or the documentation reflects the supported behavior.