configure autostart entries, build extest i686 for steam

modules/hosts/takamaki/takamaki.nix

@@ -8,7 +8,16 @@
     extraSpecialArgs = { inherit inputs; };
   };
 
-  flake.homeModules."grey@takamaki" = { pkgs, config, lib, ... }: {
+  flake.homeModules."grey@takamaki" = { pkgs, config, lib, ... }: let
+    pkgsCross = import inputs.nixpkgs {
+      localSystem = "x86_64-linux";
+      hostSystem = "x86_64-linux";
+      crossSystem = "i686-linux";
+    };
+    steam-overriden-desktop-file = pkgs.runCommand "modifySteamDesktopFile" {} ''
+      sed 's@Exec=/usr/bin/steam@Exec=env LD_PRELOAD=${pkgsCross.extest}/lib/libextest.so /usr/bin/steam@' ${self}/assets/steam.desktop.example > $out
+    '';
+  in {
     imports = with self.homeModules; [
       global
       audio
@@ -28,6 +37,13 @@
       '';
     };
 
+    xdg.dataFile."applications/steam.desktop".source = steam-overriden-desktop-file;
+
+    xdg.configFile."autostart/steam.desktop" = {
+      source = steam-overriden-desktop-file;
+      force = true;
+    };
+
     components = {
       windowManagers = "niri";
       shells = "noctalia";