diff --git a/flake.lock b/flake.lock
index b13da02..89de920 100644
--- a/flake.lock
+++ b/flake.lock
@@ -63,11 +63,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1713543876,
-        "narHash": "sha256-olEWxacm1xZhAtpq+ZkEyQgR4zgfE7ddpNtZNvubi3g=",
+        "lastModified": 1713946171,
+        "narHash": "sha256-lc75rgRQLdp4Dzogv5cfqOg6qYc5Rp83oedF2t0kDp8=",
         "owner": "lnl7",
         "repo": "nix-darwin",
-        "rev": "9e7c20ffd056e406ddd0276ee9d89f09c5e5f4ed",
+        "rev": "230a197063de9287128e2c68a7a4b0cd7d0b50a7",
         "type": "github"
       },
       "original": {
@@ -329,11 +329,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1713809191,
-        "narHash": "sha256-9Tb5JKcacjxNF1f7gsu/4l4Gxa2qflq9x1hhdl10iwM=",
+        "lastModified": 1713992342,
+        "narHash": "sha256-bW7K4WPo6jhYMo4ZUGoJfog6xJV0XZh8adXqZKunRoc=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "e866aae5bbbcfe6798ca05d3004a4e62f1828954",
+        "rev": "2f072c127c041eec36621b8e38a531fe0fe07961",
         "type": "github"
       },
       "original": {
@@ -350,11 +350,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1713763883,
-        "narHash": "sha256-/3aEYe0LEoUy5/1cs9EhcFhT4r8RnbHBziuI40vmK6E=",
+        "lastModified": 1713946567,
+        "narHash": "sha256-gbffQxWoGmq9rmSwM2y4a+VGaTTuXSN+yyRoCkMuRjs=",
         "owner": "jovian-experiments",
         "repo": "jovian-nixos",
-        "rev": "9bb2ac68cab837aa063b8da40991cecc37de75a1",
+        "rev": "c3255d642c945847c61a867be15de63b8f81d5dc",
         "type": "github"
       },
       "original": {
@@ -395,11 +395,11 @@
     "lix": {
       "flake": false,
       "locked": {
-        "lastModified": 1713713879,
-        "narHash": "sha256-7B3CVSSM8kyDsAJ8wlxL6Rf3StpBTlryiMLXPQlh4nQ=",
+        "lastModified": 1713972932,
+        "narHash": "sha256-5+Mbgk2C8sNm7J2CNSi21YYTf3T6ow4QvgM+YX/t9pg=",
         "ref": "refs/heads/main",
-        "rev": "4206635f9140a12ae2e3f1d49714ddfcf44fd2f8",
-        "revCount": 15414,
+        "rev": "8175e47ce5ddf3bde64eb0a0f589a307a317c2bb",
+        "revCount": 15425,
         "type": "git",
         "url": "ssh://git@lix.systems/lix-project/lix"
       },
@@ -423,11 +423,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1713758264,
-        "narHash": "sha256-x7uHPs9qI9hhWW4BJnJaTSX2KO1CGq/ltUR8XlUpYoQ=",
+        "lastModified": 1713823914,
+        "narHash": "sha256-phAcUYvh3tuCTCBkB/i4cfU4QafrNub6rvRqD2Wcbt4=",
         "ref": "refs/heads/main",
-        "rev": "71f268f215dbd6d8755813d9674a4cd588f10552",
-        "revCount": 51,
+        "rev": "21907b875dcc5472faea29a0eabf114966fcff84",
+        "revCount": 53,
         "type": "git",
         "url": "ssh://git@lix.systems/lix-project/nixos-module"
       },
@@ -443,11 +443,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1713668931,
-        "narHash": "sha256-rVlwWQlgFGGK3aPVcKmtYqWgjYnPah5FOIsYAqrMN2w=",
+        "lastModified": 1713869268,
+        "narHash": "sha256-o3CMQeu/S8/4zU0pMtYg51rd1FWdJsI2Xohzng1Ysdg=",
         "owner": "nix-community",
         "repo": "nix-index-database",
-        "rev": "07ece11b22217b8459df589f858e92212b74f1a1",
+        "rev": "dcb6ac44922858ce3a5b46f77a36d6030181460c",
         "type": "github"
       },
       "original": {
@@ -458,11 +458,11 @@
     },
     "nixos-hardware": {
       "locked": {
-        "lastModified": 1713521961,
-        "narHash": "sha256-EwR8wW9AqJhSIY+0oxWRybUZ32BVKuZ9bjlRh8SJvQ8=",
+        "lastModified": 1713864415,
+        "narHash": "sha256-/BPDMJEkrsFAFOsQWhwm31wezlgshPFlLBn34KEUdVA=",
         "owner": "nixos",
         "repo": "nixos-hardware",
-        "rev": "5d48925b815fd202781bfae8fb6f45c07112fdb2",
+        "rev": "797f8d8082c7cc3259cba7275c699d4991b09ecc",
         "type": "github"
       },
       "original": {
@@ -473,11 +473,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1713714899,
-        "narHash": "sha256-+z/XjO3QJs5rLE5UOf015gdVauVRQd2vZtsFkaXBq2Y=",
+        "lastModified": 1713895582,
+        "narHash": "sha256-cfh1hi+6muQMbi9acOlju3V1gl8BEaZBXBR9jQfQi4U=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "6143fc5eeb9c4f00163267708e26191d1e918932",
+        "rev": "572af610f6151fd41c212f897c71f7056e3fb518",
         "type": "github"
       },
       "original": {
@@ -520,11 +520,11 @@
         "pre-commit-hooks": "pre-commit-hooks"
       },
       "locked": {
-        "lastModified": 1713812755,
-        "narHash": "sha256-L6z7NY0UMbO5DKFFjUleIGcuAt8XwOvD0YUVUqSeGBw=",
+        "lastModified": 1713939051,
+        "narHash": "sha256-EwDbsFjpXANXd2MIvRm4Bz2CDNWIhlV/659xOAxhEv0=",
         "owner": "nix-community",
         "repo": "nixvim",
-        "rev": "6ebd538ede5a0de49253620828ba28dc57988305",
+        "rev": "f2f97d844bb39559f3356e209b49c92900d860b8",
         "type": "github"
       },
       "original": {
diff --git a/system/smolder/boot-config.nix b/system/smolder/boot-config.nix
index 27cd222..439eb78 100644
--- a/system/smolder/boot-config.nix
+++ b/system/smolder/boot-config.nix
@@ -1,6 +1,14 @@
 { config, pkgs, ... }:
 {
-  hardware.deviceTree.filter = "rk3588-rock-5b.dtb";
+  hardware.deviceTree = {
+    filter = "rk3588-rock-5b.dtb";
+    overlays = [
+      {
+        name = "fan";
+        dtsFile = ./fan.dts;
+      }
+    ];
+  };
 
   boot = {
     loader.grub.enable = false;
diff --git a/system/smolder/fan.dts b/system/smolder/fan.dts
new file mode 100644
index 0000000..be364f9
--- /dev/null
+++ b/system/smolder/fan.dts
@@ -0,0 +1,43 @@
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/pinctrl/rockchip.h>
+#include <dt-bindings/usb/pd.h>
+
+/ {
+	compatible = "radxa,rock-5b";
+
+	fragment@0 {
+		target-path = "/";
+		__overlay__ {
+			vcc12v_dcin: vcc12v-dcin-regulator {
+				compatible = "regulator-fixed";
+				regulator-name = "vcc12v_dcin";
+				regulator-always-on;
+				regulator-boot-on;
+				regulator-min-microvolt = <12000000>;
+				regulator-max-microvolt = <12000000>;
+			};
+		};
+	};
+	fragment@1 {
+		target-path = "/";
+		__overlay__ {
+			ext_fan: ext-fan {
+				compatible = "pwm-fan";
+				cooling-levels = <0 95 145 195 255>;
+				fan-supply = <&vcc12v_dcin>;
+				pwms = <&pwm12 0 50000 0>;
+				#cooling-cells = <2>;
+			};
+		};
+	};
+
+	fragment@2 {
+		target = <&pwm12>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+};