diff --git a/nixos/.config/nixos/flake.lock b/nixos/.config/nixos/flake.lock
index 5f68c7f2..03441adb 100644
--- a/nixos/.config/nixos/flake.lock
+++ b/nixos/.config/nixos/flake.lock
@@ -30,11 +30,11 @@
         "nixpkgs": "nixpkgs"
       },
       "locked": {
-        "lastModified": 1793521359,
-        "narHash": "sha256-zuOGY+12jayYHg4Y1D3Xo5x/jNfgaikSemB3oqNtxEc=",
+        "lastModified": 1793742908,
+        "narHash": "sha256-hyDlsmep/RhFlSVnHBQdKXDgTnQDB6eo1LYQZzmBlKg=",
         "owner": "chaotic-cx",
         "repo": "nyx",
-        "rev": "5ea9b4d2d62a5eb4321002a3b0ee1524b86db299",
+        "rev": "4bd136e6f98e240ba0e5d3c494ac8e131b6ecda7",
         "type": "github"
       },
       "original": {
@@ -232,11 +232,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1793193205,
-        "narHash": "sha256-X6xa6sGA7RnJQuZGbFMC+K+KToWAlBDCCjJXfTwEPsw=",
+        "lastModified": 1793757180,
+        "narHash": "sha256-gyV7AtCwLnOImcrfSETP4J3Ie96bz19DY47B7m7Y3HM=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "095fef2f265c3c0da4fe315efba8f8a04495ab34",
+        "rev": "b787c48e2ec57a9d098f5c2721882a3bc1e16f97",
         "type": "github"
       },
       "original": {
@@ -271,7 +271,7 @@
     "mybase_blocklist": {
       "flake": false,
       "locked": {
-        "narHash": "sha256-M4bx0pIA3TNw7mhQt6P51HO2QzBoNg/vzXhRH1Fsmn8=",
+        "narHash": "sha256-uMD1XdPHNs7ZZ7CfQSqBZmwnzFKcaoqDPhr0f2KPM/k=",
         "type": "file",
         "url": "https://download.dnscrypt.info/blacklists/domains/mybase.txt"
       },
@@ -302,11 +302,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1793341285,
-        "narHash": "sha256-LOv16TsMYV2/8BUYnhSxHkOASe7es2ORbqMeLlZJ8Hc=",
-        "rev": "1c89083e451e891152365b799595cf7790a43325",
+        "lastModified": 1793540411,
+        "narHash": "sha256-us2GRWGXbOQpN1blyJGvmdx+g4bv9GoFYq5iiOHRiZ8=",
+        "rev": "0bb2eedc20e4739f29e8045034f2828ad7054f8f",
         "type": "tarball",
-        "url": "https://releases.nixos.org/nixos/unstable/nixos-26.11pre1105037.1c89083e451e/nixexprs.tar.zst"
+        "url": "https://releases.nixos.org/nixos/unstable/nixos-26.11pre1106360.0bb2eedc20e4/nixexprs.tar.zst"
       },
       "original": {
         "type": "tarball",
@@ -345,11 +345,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1793341285,
-        "narHash": "sha256-LOv16TsMYV2/8BUYnhSxHkOASe7es2ORbqMeLlZJ8Hc=",
-        "rev": "1c89083e451e891152365b799595cf7790a43325",
+        "lastModified": 1793540411,
+        "narHash": "sha256-us2GRWGXbOQpN1blyJGvmdx+g4bv9GoFYq5iiOHRiZ8=",
+        "rev": "0bb2eedc20e4739f29e8045034f2828ad7054f8f",
         "type": "tarball",
-        "url": "https://releases.nixos.org/nixos/unstable/nixos-26.11pre1105037.1c89083e451e/nixexprs.tar.zst"
+        "url": "https://releases.nixos.org/nixos/unstable/nixos-26.11pre1106360.0bb2eedc20e4/nixexprs.tar.zst"
       },
       "original": {
         "type": "tarball",
@@ -364,11 +364,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1793587400,
-        "narHash": "sha256-GZlRFNYicMkGgpbdWvpGqC7PKmUP/v5R0RmDajeoxtE=",
+        "lastModified": 1793761941,
+        "narHash": "sha256-kFKK/kgFLLaZR04Xk8ndMK2vAlr6MdoyZzQPW8THV0Y=",
         "owner": "nix-community",
         "repo": "NUR",
-        "rev": "7a48dfef2a847b0a993f5f14e60fce29d91b429e",
+        "rev": "a329af14902bc5590df6af37f9e86c91f7e61927",
         "type": "github"
       },
       "original": {
@@ -443,11 +443,11 @@
         "systems": "systems"
       },
       "locked": {
-        "lastModified": 1793531264,
-        "narHash": "sha256-rbmfLn4/UWs1mrMJgMEJXMfdhN7o7i++c5jPtUdlP+8=",
+        "lastModified": 1793662659,
+        "narHash": "sha256-a+za5QCDlOe/PsuMlZiBcQ13cyiyOscK17BAJFu1/dE=",
         "owner": "Gerg-L",
         "repo": "spicetify-nix",
-        "rev": "d818ab64010272bc0072d0c325838a63038796e9",
+        "rev": "13e6fed4eb99f809d390fb50f591bed6cb716dc0",
         "type": "github"
       },
       "original": {
@@ -508,11 +508,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1793309674,
-        "narHash": "sha256-d1Tvbgn//HQ3f1PDh/iIMEpvuUu9Lc4lJqiwGl18cY8=",
+        "lastModified": 1793752983,
+        "narHash": "sha256-2T4ay/hK055JGIv7eE036v693+Z4p60tBxowfLk0G5Q=",
         "owner": "0xc000022070",
         "repo": "zen-browser-flake",
-        "rev": "2656d974602749ca5594b133e3022a241ab5d4e0",
+        "rev": "a643602101835da649bf016714c9121fba7dda53",
         "type": "github"
       },
       "original": {
diff --git a/nixos/.config/nixos/modules/nix.nix b/nixos/.config/nixos/modules/nix.nix
index ffaac59c..ca105432 100644
--- a/nixos/.config/nixos/modules/nix.nix
+++ b/nixos/.config/nixos/modules/nix.nix
@@ -17,5 +17,10 @@ _:
     };
   };
 
-  nixpkgs.config.allowUnfree = true;
+  nixpkgs.config = {
+    allowUnfree = true;
+    # gtk2 is still pulled in by lutris's FHS environment; nixpkgs marks it
+    # broken and plans to remove it in NixOS 27.05.
+    problems.handlers."gtk+".broken = "warn";
+  };
 }
diff --git a/nixos/.config/nixos/modules/packages.nix b/nixos/.config/nixos/modules/packages.nix
index d7b0adb1..3d83c206 100644
--- a/nixos/.config/nixos/modules/packages.nix
+++ b/nixos/.config/nixos/modules/packages.nix
@@ -175,7 +175,6 @@
 
       # Required
       glib
-      gtk2
 
       # Inspired by steam
       # https://github.com/NixOS/nixpkgs/blob/master/pkgs/by-name/st/steam/package.nix#L36-L85
diff --git a/nixos/.config/nixos/pkgs/valgrind-codspeed/default.nix b/nixos/.config/nixos/pkgs/valgrind-codspeed/default.nix
index 1547311e..d69be355 100644
--- a/nixos/.config/nixos/pkgs/valgrind-codspeed/default.nix
+++ b/nixos/.config/nixos/pkgs/valgrind-codspeed/default.nix
@@ -14,13 +14,13 @@
 
 stdenv.mkDerivation rec {
   pname = "valgrind-codspeed";
-  version = "3.26.0-0codspeed10";
+  version = "3.26.0-0codspeed12";
 
   src = fetchFromGitHub {
     owner = "CodSpeedHQ";
     repo = "valgrind-codspeed";
     rev = "refs/tags/${version}";
-    hash = "sha256-zYHtvCNuq6NN092MxZp7slLuknJKJaYuvAKMdC8T9mg=";
+    hash = "sha256-QoiCUJeTtdBLG5r7ZaAclThDBwGtvsDXl4yphnbOGCg=";
 
     fetchSubmodules = true;
   };