diff --git a/devices/pc/default.nix b/devices/pc/default.nix
index 15a61c55..86ec61c2 100644
--- a/devices/pc/default.nix
+++ b/devices/pc/default.nix
@@ -168,12 +168,17 @@ inputs:
     users.users.qemu-libvirtd.extraGroups = [ "disk" ];
     networking.extraHosts = "74.211.99.69 mirism.one beta.mirism.one ng01.mirism.one";
     services.colord.enable = true;
-    environment.persistence."/nix/archive" =
+    environment =
     {
-      hideMounts = true;
-      users.chn.directories = builtins.map
-        (dir: { directory = "repo/${dir}"; user = "chn"; group = "chn"; mode = "0755"; })
-        [ "BPD-paper" "kurumi-asmr" "BPD-paper-old" "SiC-20240705" ];
+      persistence."/nix/archive" =
+      {
+        hideMounts = true;
+        users.chn.directories = builtins.map
+          (dir: { directory = "repo/${dir}"; user = "chn"; group = "chn"; mode = "0755"; })
+          [ "BPD-paper" "kurumi-asmr" "BPD-paper-old" "SiC-20240705" ];
+      };
+      sessionVariables.KWIN_DRM_DEVICES =
+        "/dev/dri/by-path/pci-0000\:01\:00.0-card:/dev/dri/by-path/pci-0000\:06\:00.0-card";
     };
     specialisation =
     {