# Installation fails due to cache.nixos.org connection issues

**URL:** https://discourse.nixos.org/t/installation-fails-due-to-cache-nixos-org-connection-issues/78023
**Category:** Help
**Created:** [June 2, 2026, 7:31pm UTC](https://discourse.nixos.org/t/installation-fails-due-to-cache-nixos-org-connection-issues/78023 "2026-06-02T19:31:24Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![waffle8946](https://discourse.nixos.org/user_avatar/discourse.nixos.org/waffle8946/32/27221_2.png) [@waffle8946](https://discourse.nixos.org/u/waffle8946)
#### Post date: [June 2, 2026, 8:39pm UTC](https://discourse.nixos.org/t/installation-fails-due-to-cache-nixos-org-connection-issues/78023/2 "2026-06-02T20:39:50Z")

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My go-to is the TUNA mirror, if Fastly is really the issue:

> [@Announcing TUNA Nix mirror](https://discourse.nixos.org/t/announcing-tuna-nix-mirror/6144):
>
> For Nix users in China, the slow download speed of [https://cache.nixos.org](https://cache.nixos.org) and other services has been a long standing issue. After quite a bit of time and work, I’m pleased to announce that has the TUNA mirror of Nix/Nixpkgs/NixOS has completed its initial download and is up and running. If you’re experienced with Nix, this list of URLs should get you started: (URLs listed relative to [https://mirrors.tuna.tsinghua.edu.cn](https://mirrors.tuna.tsinghua.edu.cn)) Nix mirror: [/nix](https://mirrors.tuna.tsinghua.edu.cn/nix) Nix install script: [/nix/latest/install](https://mirrors.tuna.tsinghua.edu.cn/nix/latest/install) Nix channel…

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_[View the full topic](https://discourse.nixos.org/t/installation-fails-due-to-cache-nixos-org-connection-issues/78023)._