From 28e10128fff866f5afa46eb4ebdb64058b526707 Mon Sep 17 00:00:00 2001
From: bin456789 <bin456789@gmail.com>
Date: Fri, 17 Oct 2025 20:57:27 +0800
Subject: [PATCH] =?UTF-8?q?nixos:=20nix=20=E7=89=88=E6=9C=AC=E5=8F=B7?=
 =?UTF-8?q?=E4=BD=BF=E7=94=A8=E7=9B=AE=E6=A0=87=E7=B3=BB=E7=BB=9F=E9=87=8C?=
 =?UTF-8?q?=E9=9D=A2=E7=9A=84=EF=BC=8C=E4=BB=A5=E4=BF=AE=E5=A4=8D=20nixos-?=
 =?UTF-8?q?install=20=E9=98=B6=E6=AE=B5=E6=8A=A5=E9=94=99?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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fixes #451
---
 trans.sh | 34 +++++++++++++++++++++++++++++-----
 1 file changed, 29 insertions(+), 5 deletions(-)

diff --git a/trans.sh b/trans.sh
index 71983b7..b5fd282 100644
--- a/trans.sh
+++ b/trans.sh
@@ -1613,11 +1613,36 @@ install_nixos() {
             done
         fi
 
-        if is_in_china; then
-            sh=https://mirror.nju.edu.cn/nix/latest/install
+        # 备用方案
+        # 1. 从 https://mirror.nju.edu.cn/nix-channels/nixos-25.05/nixexprs.tar.xz 获取
+        #    https://github.com/NixOS/nixpkgs/blob/nixos-25.05/pkgs/tools/package-management/nix/default.nix
+        #    https://github.com/NixOS/nixpkgs/blob/nixos-25.05/nixos/modules/installer/tools/nix-fallback-paths.nix
+        # 2. 安装最新版 nix，添加 nixos channel 后获取
+        #    nix eval -f '<nixpkgs>' --raw 'nixVersions.stable.version' --extra-experimental-features nix-command
+
+        if true; then
+            # nix 版本号使用目标系统里面的
+            download $mirror/nixos-$releasever/store-paths.xz /os/store-paths.xz
+            apk add xz
+            nix_ver=$(xz -dc </os/store-paths.xz | grep -F 'vm-test-run-nix-upgrade' |
+                head -1 | awk -F- '{print $7}' | grep .)
+            rm -f /os/store-paths.xz
+            if is_in_china; then
+                sh_mirror=https://mirror.nju.edu.cn/nix
+            else
+                sh_mirror=https://releases.nixos.org/nix
+            fi
+            sh=$sh_mirror/nix-$nix_ver/install
         else
-            sh=https://nixos.org/nix/install
+            # 最新版 nix 在 nixos-install 时可能会出问题
+            # https://github.com/bin456789/reinstall/issues/451
+            if is_in_china; then
+                sh=https://mirror.nju.edu.cn/nix/latest/install
+            else
+                sh=https://nixos.org/nix/install
+            fi
         fi
+
         apk add xz
         wget -O- "$sh" | sh -s -- --no-daemon --no-channel-add
         apk del xz
@@ -1757,8 +1782,7 @@ EOF
     # 设置 channel
     if is_in_china; then
         nixos-enter --root /os -- \
-            /run/current-system/sw/bin/nix-channel \
-            --add https://mirrors.cernet.edu.cn/nix-channels/nixos-$releasever nixos
+            /run/current-system/sw/bin/nix-channel --add $mirror/nixos-$releasever nixos
     fi
 
     # 清理