diff --git a/flake.lock b/flake.lock
index 8392c9c..8a13f83 100644
--- a/flake.lock
+++ b/flake.lock
@@ -21,6 +21,27 @@
         "type": "github"
       }
     },
+    "home-manager-unstable": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1691882297,
+        "narHash": "sha256-e1/LAQSGLnBywfA1TfMl0Vj3tvYka73XOZ/D2/CJowE=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "c3ab5ea047e6dc73df530948f7367455749d8906",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "ref": "master",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
     "impermanence": {
       "locked": {
         "lastModified": 1690797372,
@@ -43,11 +64,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1691292840,
-        "narHash": "sha256-NA+o/NoOOQhzAQwB2JpeKoG+iYQ6yn/XXVxaGd5HSQI=",
+        "lastModified": 1691897365,
+        "narHash": "sha256-jvWIU4ht3YAmF8TDVM2Ps2+Gf4MtNGLL1zEWQZdTrzU=",
         "owner": "nix-community",
         "repo": "nix-index-database",
-        "rev": "6c626d54d0414d34c771c0f6f9d771bc8aaaa3c4",
+        "rev": "f4d70d098f066a30c7087144063dca179495f7d6",
         "type": "github"
       },
       "original": {
@@ -58,11 +79,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1691592289,
-        "narHash": "sha256-Lqpw7lrXlLkYra33tp57ms8tZ0StWhbcl80vk4D90F8=",
+        "lastModified": 1691831739,
+        "narHash": "sha256-6e12VCvA7jOjhzJ1adLiUV1GTPXGBcCfhggsDwiuNB4=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "9034b46dc4c7596a87ab837bb8a07ef2d887e8c7",
+        "rev": "3fe694c4156b84dac12627685c7ae592a71e2206",
         "type": "github"
       },
       "original": {
@@ -72,12 +93,30 @@
         "type": "github"
       }
     },
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1691654369,
+        "narHash": "sha256-gSILTEx1jRaJjwZxRlnu3ZwMn1FVNk80qlwiCX8kmpo=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "ce5e4a6ef2e59d89a971bc434ca8ca222b9c7f5e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "home-manager": "home-manager",
+        "home-manager-unstable": "home-manager-unstable",
         "impermanence": "impermanence",
         "nix-index-database": "nix-index-database",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "nixpkgs-unstable": "nixpkgs-unstable"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index 48f57db..e917a4d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -5,6 +5,9 @@
     nixpkgs = {
       url = "github:NixOS/nixpkgs/nixos-23.05";
     };
+    nixpkgs-unstable = {
+      url = "github:NixOS/nixpkgs/nixos-unstable";
+    };
     impermanence = {
       url = "github:nix-community/impermanence";
     };
@@ -16,6 +19,10 @@
       url = "github:nix-community/home-manager/release-23.05";
       inputs.nixpkgs.follows = "nixpkgs"; # use the same nixpkgs as the system
     };
+    home-manager-unstable = {
+      url = "github:nix-community/home-manager/master";
+      inputs.nixpkgs.follows = "nixpkgs"; # use the same nixpkgs as the system
+    };
   };
 
   outputs = { self, nixpkgs, ... }@inputs: {
@@ -27,25 +34,19 @@
       omega = nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
         specialArgs = inputs; # pass flake inputs to modules
-        modules = [
-          ./hosts/omega
-        ];
+        modules = [ ./hosts/omega ];
       };
       # Laptop
       zeta = nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
         specialArgs = inputs; # pass flake inputs to modules
-        modules = [
-          ./hosts/zeta
-        ];
+        modules = [ ./hosts/zeta ];
       };
       # Tor relay
       tor = nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
         specialArgs = inputs; # pass flake inputs to modules
-        modules = [
-          ./hosts/tor
-        ];
+        modules = [ ./hosts/tor ];
       };
     };
   };
diff --git a/hosts/omega/default.nix b/hosts/omega/default.nix
index 0711f6b..a32f86e 100644
--- a/hosts/omega/default.nix
+++ b/hosts/omega/default.nix
@@ -1,6 +1,7 @@
 { ... }: {
   imports = [
     ./hardware.nix
+    ../../overlays
     ../../modules/base
     ../../modules/desktop
   ];
diff --git a/hosts/omega/hardware.nix b/hosts/omega/hardware.nix
index 4960879..77423ac 100644
--- a/hosts/omega/hardware.nix
+++ b/hosts/omega/hardware.nix
@@ -36,12 +36,12 @@
   fileSystems."/mnt/C" = {
     device = "/dev/disk/by-label/C";
     fsType = "ntfs-3g";
-    options = [ "rw" "uid=1000"];
+    options = [ "rw" "uid=1000" ];
   };
   fileSystems."/mnt/Backup" = {
     device = "/dev/disk/by-label/Backup";
     fsType = "ntfs-3g";
-    options = [ "rw" "uid=1000"];
+    options = [ "rw" "uid=1000" ];
   };
 
   # Enables DHCP on all ethernet and wireless LAN interfaces.
diff --git a/hosts/tor/default.nix b/hosts/tor/default.nix
index b79c9ee..699041e 100644
--- a/hosts/tor/default.nix
+++ b/hosts/tor/default.nix
@@ -2,6 +2,7 @@
   imports = [
     ./hardware.nix
     ./tor.nix
+    ../../overlays
     ../../modules/base
     ../../modules/tor
   ];
diff --git a/hosts/zeta/default.nix b/hosts/zeta/default.nix
index d3295bc..23437a5 100644
--- a/hosts/zeta/default.nix
+++ b/hosts/zeta/default.nix
@@ -1,6 +1,7 @@
 { ... }: {
   imports = [
     ./hardware.nix
+    ../../overlays
     ../../modules/base
     ../../modules/desktop
   ];
diff --git a/modules/desktop/default.nix b/modules/desktop/default.nix
index 8f29767..cc49951 100644
--- a/modules/desktop/default.nix
+++ b/modules/desktop/default.nix
@@ -1,6 +1,7 @@
 { pkgs, ... }: {
   imports = [
     ./firefox.nix
+    ./kanshi.nix
     ./network.nix
     ./ssh.nix
     ./sway.nix
diff --git a/modules/desktop/kanshi.nix b/modules/desktop/kanshi.nix
new file mode 100644
index 0000000..7935499
--- /dev/null
+++ b/modules/desktop/kanshi.nix
@@ -0,0 +1,25 @@
+{ home-manager, lib, pkgs, ... }: {
+  # https://nix-community.github.io/home-manager/options.html
+
+  home-manager.users.caspervk = {
+    services.kanshi = {
+      enable = true;
+      profiles = {
+        # Output names ("criteria") from `swaymsg -t get_outputs`.
+        home.outputs = [
+          {
+            criteria = "ASUSTek COMPUTER INC ROG XG27AQ M3LMQS370969";
+            mode = "2560x1440@144Hz";
+            position = "0,0";
+            adaptiveSync = true;
+          }
+          {
+            criteria = "BNQ BenQ XL2411Z SCD06385SL0";
+            mode = "1920x1080@144Hz";
+            position = "2560,0";
+          }
+        ];
+      };
+    };
+  };
+}
diff --git a/overlays/default.nix b/overlays/default.nix
new file mode 100644
index 0000000..61c403a
--- /dev/null
+++ b/overlays/default.nix
@@ -0,0 +1,5 @@
+{ ... }: {
+  imports = [
+    ./kanshi.nix
+  ];
+}
diff --git a/overlays/kanshi.nix b/overlays/kanshi.nix
new file mode 100644
index 0000000..d5507b1
--- /dev/null
+++ b/overlays/kanshi.nix
@@ -0,0 +1,14 @@
+{ home-manager, home-manager-unstable, nixpkgs-unstable, ... }: {
+  # adaptiveSync requires the unstable kanshi nixpkgs and home-manager module
+
+  nixpkgs.overlays = [
+    (self: super: {
+      kanshi = nixpkgs-unstable.legacyPackages.${super.system}.kanshi;
+    })
+  ];
+
+  home-manager.users.caspervk = {
+    disabledModules = [ "${home-manager}/modules/services/kanshi.nix" ];
+    imports = [ "${home-manager-unstable}/modules/services/kanshi.nix" ];
+  };
+}