From b284c90451443c8da21739650538240a639e9d3e Mon Sep 17 00:00:00 2001
From: magic_rb <magic_rb@redalder.org>
Date: Sat, 25 Nov 2023 17:59:48 +0100
Subject: [PATCH] Finally get gamescope working properly in Steam

Signed-off-by: magic_rb <magic_rb@redalder.org>
---
 nixos/common/steam.nix | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/nixos/common/steam.nix b/nixos/common/steam.nix
index f3dd670..e01ae7e 100644
--- a/nixos/common/steam.nix
+++ b/nixos/common/steam.nix
@@ -1,9 +1,18 @@
-{ pkgs, lib, ... }:
+{ pkgs, lib, config, ... }:
 {
   programs.gamemode.enable = true;
   programs.gamescope = {
     enable = true;
-    capSysNice = true;
+    # Wrappers don't work in steams FHSEnv cause security reasons (ig valid)
+    capSysNice = false;
+  };
+
+  # Therefore we wrap gamescope with the capability under an alias
+  security.wrappers.gamescope-nice = {
+    owner = "root";
+    group = "root";
+    source = "${pkgs.gamescope}/bin/gamescope";
+    capabilities = "cap_sys_nice+pie";
   };
 
   environment.systemPackages = with pkgs; [
@@ -18,6 +27,8 @@
         p.libkrb5
         p.keyutils
       ];
+      # this is the worst thing I have written in ages, but it works
+      buildFHSEnv = x: pkgs.buildFHSEnv (x // { extraBwrapArgs = x.extraBwrapArgs ++ [ "--cap-add CAP_SYS_NICE --cap-add CAP_SETPCAP" ]; });
     };
   };