That's a five minutes walk.哪里错了?说出理由

That's a five minutes walk.哪里错了?
说出理由

正确的是：
That's a five minutes‘ walk. 复数名词的所有格five minutes' walk 五分钟的程.
或
That's a five- minute walk. （数字与名词组成的复数形容词用‘-’连接,名词不能加S

That's five minutes walk.
walk 不可数