From efef69a51dd48a12beb518b67c534238842249d8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8C=97=E9=9B=81=20Cryolitia?= <Cryolitia@gmail.com>
Date: Sun, 26 May 2024 22:03:50 +0800
Subject: [PATCH 1/2] nixos/steam: add option `extraPackages`

---
 nixos/modules/programs/steam.nix | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/nixos/modules/programs/steam.nix b/nixos/modules/programs/steam.nix
index 31577ac2de45..245afc8d399b 100644
--- a/nixos/modules/programs/steam.nix
+++ b/nixos/modules/programs/steam.nix
@@ -55,6 +55,7 @@ in {
             then [ package ] ++ extraPackages
             else [ package32 ] ++ extraPackages32;
         in prevLibs ++ additionalLibs;
+        extraPkgs = p: (cfg.extraPackages ++ lib.optionals (prev ? extraPkgs) (prev.extraPkgs p));
       } // lib.optionalAttrs (cfg.gamescopeSession.enable && gamescopeCfg.capSysNice)
       {
         buildFHSEnv = pkgs.buildFHSEnv.override {
@@ -71,6 +72,19 @@ in {
       '';
     };
 
+    extraPackages = lib.mkOption {
+      type = lib.types.listOf lib.types.package;
+      default = [ ];
+      example = lib.literalExpression ''
+        with pkgs; [
+          gamescope
+        ]
+      '';
+      description = ''
+        Additional packages to add to the Steam environment.
+      '';
+    };
+
     extraCompatPackages = lib.mkOption {
       type = lib.types.listOf lib.types.package;
       default = [ ];

From 164f66169a0bae512fc445d4f888f78012f05781 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8C=97=E9=9B=81=20Cryolitia?= <Cryolitia@gmail.com>
Date: Sun, 26 May 2024 22:55:38 +0800
Subject: [PATCH 2/2] nixos/steam: add option fontPackages

fix #178121
---
 nixos/modules/programs/steam.nix | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/nixos/modules/programs/steam.nix b/nixos/modules/programs/steam.nix
index 245afc8d399b..6af8d3aea903 100644
--- a/nixos/modules/programs/steam.nix
+++ b/nixos/modules/programs/steam.nix
@@ -102,6 +102,18 @@ in {
       '';
     };
 
+    fontPackages = lib.mkOption {
+      type = lib.types.listOf lib.types.package;
+      default = config.fonts.packages;
+      defaultText = lib.literalExpression "fonts.packages";
+      example = lib.literalExpression "with pkgs; [ source-han-sans ]";
+      description = ''
+        Font packages to use in Steam.
+
+        Defaults to system fonts, but could be overridden to use other fonts — useful for users who would like to customize CJK fonts used in Steam. According to the [upstream issue](https://github.com/ValveSoftware/steam-for-linux/issues/10422#issuecomment-1944396010), Steam only follows the per-user fontconfig configuration.
+      '';
+    };
+
     remotePlay.openFirewall = lib.mkOption {
       type = lib.types.bool;
       default = false;
@@ -179,6 +191,8 @@ in {
       };
     };
 
+    programs.steam.extraPackages = cfg.fontPackages;
+
     programs.gamescope.enable = lib.mkDefault cfg.gamescopeSession.enable;
     services.displayManager.sessionPackages = lib.mkIf cfg.gamescopeSession.enable [ gamescopeSessionFile ];