diff --git a/flake.lock b/flake.lock
index 65d830e..d268ce2 100644
--- a/flake.lock
+++ b/flake.lock
@@ -16,9 +16,26 @@
         "type": "github"
       }
     },
+    "nixpkgs-empyrean": {
+      "locked": {
+        "lastModified": 1646588256,
+        "narHash": "sha256-ZHljmNlt19nSm0Mz8fx6QEhddKUkU4hhwFmfNmGn+EY=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "2ebb6c1e5ae402ba35cca5eec58385e5f1adea04",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "2ebb6c1e5ae402ba35cca5eec58385e5f1adea04",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "nixpkgs-empyrean": "nixpkgs-empyrean"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index fd3ef33..463b1c2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,14 +1,15 @@
 {
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs?rev=20fc948445a6c22d4e8d5178e9a6bc6e1f5417c8";
+    nixpkgs-empyrean.url = "github:NixOS/nixpkgs?rev=2ebb6c1e5ae402ba35cca5eec58385e5f1adea04";
   };
 
-  outputs = { self, nixpkgs }: {
+  outputs = { self, nixpkgs, nixpkgs-empyrean }: {
     nixosConfigurations.catacomb = nixpkgs.lib.nixosSystem {
       system = "aarch64-linux";
       modules = [ ./machine/catacomb ];
     };
-    nixosConfigurations.empyrean = nixpkgs.lib.nixosSystem {
+    nixosConfigurations.empyrean = nixpkgs-empyrean.lib.nixosSystem {
       system = "x86_64-linux";
       modules = [ ./machine/empyrean ];
     };