nixpkgs/nixos/doc/manual/installation/installing-behind-a-proxy.section.md

Installing behind a proxy

To install NixOS behind a proxy, do the following before running nixos-install.

1. Update proxy configuration in /mnt/etc/nixos/configuration.nix to keep the internet accessible after reboot.

   networking.proxy.default = "http://user:password@proxy:port/";
   networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";
   

2. Setup the proxy environment variables in the shell where you are running nixos-install.

   # proxy_url="http://user:password@proxy:port/"
   # export http_proxy="$proxy_url"
   # export HTTP_PROXY="$proxy_url"
   # export https_proxy="$proxy_url"
   # export HTTPS_PROXY="$proxy_url"
   

::: {.note} If you are switching networks with different proxy configurations, use the specialisation option in configuration.nix to switch proxies at runtime. Refer to for more information. :::