From 0f8b5fa88d5871ecffd320c1a8fe804c1117bced Mon Sep 17 00:00:00 2001
From: Aoran Zeng <ccmywish@qq.com>
Date: Tue, 24 Feb 2026 17:31:09 +0800
Subject: [PATCH] =?UTF-8?q?=E8=BF=90=E8=A1=8C=E6=97=B6=E6=A3=80=E6=B5=8B?=
 =?UTF-8?q?=20`Nix`=20=E5=AE=89=E8=A3=85=E6=96=B9=E5=BC=8F=E7=84=B6?=
 =?UTF-8?q?=E5=90=8E=E5=86=8D=E7=A1=AE=E5=AE=9A=20scope=20[GitHub=20#337]?=
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---
 src/recipe/ware/Nix.c | 49 +++++++++++++++++++++++++++++++++++++++----
 1 file changed, 45 insertions(+), 4 deletions(-)

diff --git a/src/recipe/ware/Nix.c b/src/recipe/ware/Nix.c
index 5f71359..d9076a8 100644
--- a/src/recipe/ware/Nix.c
+++ b/src/recipe/ware/Nix.c
@@ -4,13 +4,31 @@
 
 def_target(wr_nix, "nix");
 
+/**
+ * 运行时检查到底是哪种安装方式
+ *
+ * https://github.com/RubyMetric/chsrc/issues/337
+ */
+bool
+wr_nix_is_multi_user_installation_mode ()
+{
+  if (xy_file_exist ("/nix/var/nix/daemon-socket/socket"))
+    {
+     return true;
+    }
+  else
+    {
+      return false;
+    }
+}
+
 void
 wr_nix_prelude ()
 {
   chef_prep_this (wr_nix, s);
 
   chef_set_recipe_created_on   (this, "2023-09-26");
-  chef_set_recipe_last_updated (this, "2025-08-09");
+  chef_set_recipe_last_updated (this, "2026-02-24");
   chef_set_sources_last_updated (this, "2025-07-13");
 
   chef_set_chef (this, NULL);
@@ -19,8 +37,16 @@ wr_nix_prelude ()
 
   chef_set_scope_cap (this, ProjectScope, ScopeCap_Unable);
   chef_set_scope_cap (this, UserScope,    ScopeCap_Able_And_Implemented);
-  chef_set_scope_cap (this, SystemScope,  ScopeCap_Unable);
-  chef_set_default_scope (this, UserScope);
+  chef_set_scope_cap (this, SystemScope,  ScopeCap_Able_And_Implemented);
+
+  if (wr_nix_is_multi_user_installation_mode ())
+    {
+      chef_set_default_scope (this, SystemScope);
+    }
+  else
+    {
+      chef_set_default_scope (this, UserScope);
+    }
 
   chef_deny_english(this);
   chef_deny_user_define(this);
@@ -48,6 +74,7 @@ wr_nix_check_cmd ()
  * @consult
  *    1. https://help.mirrors.cernet.edu.cn/nix-channels/
  *    2. https://gitee.com/RubyMetric/chsrc/issues/I83894
+ *    3. https://github.com/RubyMetric/chsrc/issues/337
  */
 void
 wr_nix_setsrc (char *option)
@@ -56,11 +83,25 @@ wr_nix_setsrc (char *option)
 
   chsrc_use_this_source (wr_nix);
 
+  char *user_scope_nix_config = "~/.config/nix/nix.conf";
+  char *system_scope_nix_config = "/etc/nix/nix.conf";
+
+  char *config_file = NULL;
+
+  if (wr_nix_is_multi_user_installation_mode ())
+    {
+      config_file = system_scope_nix_config;
+    }
+  else
+    {
+      config_file = user_scope_nix_config;
+    }
+
   char *cmd = xy_strcat (3, "nix-channel --add ", source.url, "nixpkgs-unstable nixpkgs");
   chsrc_run (cmd, RunOpt_Default);
 
   char *w = xy_strcat (3, "substituters = ", source.url, "store https://cache.nixos.org/");
-  chsrc_append_to_file (w, "~/.config/nix/nix.conf");
+  chsrc_append_to_file (w, config_file);
 
   chsrc_run ("nix-channel --update", RunOpt_Default);