diff --git a/base/default.nix b/base/default.nix
index a56c7ea..203e5b2 100644
--- a/base/default.nix
+++ b/base/default.nix
@@ -42,6 +42,8 @@
     displayManager.startx.enable = true;
   };
 
+  hardware.opengl.enable = true;
+
   # Enable sound.
   sound.enable = true;
   hardware.pulseaudio.enable = true;
diff --git a/home/i3/default.nix b/home/i3/default.nix
index 69ba396..3bcde22 100644
--- a/home/i3/default.nix
+++ b/home/i3/default.nix
@@ -179,7 +179,7 @@ bindsym $mod+r mode "resize"
 
 # Gaps
 for_window [class=".*"] border pixel 0
-gaps outer 10
+gaps outer -10
 gaps inner 10
 
 # screenshot