diff --git a/flake.lock b/flake.lock
index 80c502d..5ecb9f2 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "emacs-overlay": {
       "locked": {
-        "lastModified": 1625475975,
-        "narHash": "sha256-gCOhldE8f0ve5HCP5VPDGRnvh2TUfzDyWWTcfaMvov4=",
+        "lastModified": 1624901405,
+        "narHash": "sha256-K1pEfatjW7Huof8TuAJuIXxYIpZD6681e35iQSoB7+c=",
         "owner": "nix-community",
         "repo": "emacs-overlay",
-        "rev": "9fbb5e43ed6ea3b5b704f13b2169f5404c24113b",
+        "rev": "ab500b1977b48c2524d56fe1efcb5c7102319bf0",
         "type": "github"
       },
       "original": {
@@ -39,11 +39,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1625176478,
-        "narHash": "sha256-s1RTYNKw7ySyqrZjns9Cq+Nnjpp75ePgL06pgcbIpoA=",
+        "lastModified": 1624862269,
+        "narHash": "sha256-JFcsh2+7QtfKdJFoPibLFPLgIW6Ycnv8Bts9a7RYme0=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "21b696caf392ad6fa513caf3327d0aa0430ffb72",
+        "rev": "f77036342e2b690c61c97202bf48f2ce13acc022",
         "type": "github"
       },
       "original": {
@@ -55,11 +55,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1625439722,
-        "narHash": "sha256-esAlpmpvdWrRO2fTzvlW8HMXCIKr7eW5Bj12my/ys3o=",
+        "lastModified": 1624470504,
+        "narHash": "sha256-kfGPDT0J+x82CMZlIvIkGUC+yUl4XJSlz+BSVCZJUzI=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "a6c2f5e6e7a0c5e99b841cf4c38be3b027bc9883",
+        "rev": "920113a6e5e34e317c910b8477dd6cde88fcd202",
         "type": "github"
       },
       "original": {
diff --git a/home/x/i3.nix b/home/x/i3.nix
index cb87d93..076a4a6 100644
--- a/home/x/i3.nix
+++ b/home/x/i3.nix
@@ -106,6 +106,14 @@ in
               };
             };
 
+        startup = [
+          # FIXME: make it conditional on "nvidia" being part of video drivers
+          {
+            command = "nvidia-settings -a '[gpu:0]/GPUPowerMizerMode=1'";
+            notification = false;
+          }
+        ];
+
         terminal = myTerminal;
 
         assigns = {