Nix 的替换器列表并非路由表
本文解释 Nix 包管理器中替换器（substituter）列表的工作原理，指出其并非像路由表那样按优先级顺序路由请求，而是采用逐项尝试的策略。作者详细介绍了替换器的配置、行为以及常见误解，帮助用户更有效地使用 Nix 的二进制缓存功能。
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