diff --git a/default.nix b/default.nix
index 047de0c..50cd1fe 100644
--- a/default.nix
+++ b/default.nix
@@ -1,8 +1,11 @@
-{ pkgs ? import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/2ebb6c1e5ae402ba35cca5eec58385e5f1adea04.tar.gz") {}
-}:
+(import
+  (
+    let lock = builtins.fromJSON (builtins.readFile ./flake.lock); in
+    fetchTarball {
+      url = "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
+      sha256 = lock.nodes.flake-compat.locked.narHash;
+    }
+  )
+  { src = ./.; }
+).defaultNix
 
-let
-  app = pkgs.poetry2nix.mkPoetryApplication {
-    projectDir = ./.;
-  };
-in app.dependencyEnv
diff --git a/flake.lock b/flake.lock
index e67e8d7..f15fb4b 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,23 +1,40 @@
 {
   "nodes": {
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1668681692,
+        "narHash": "sha256-Ht91NGdewz8IQLtWZ9LCeNXMSXHUss+9COoqu6JLmXU=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "009399224d5e398d03b22badca40a37ac85412a1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1646588256,
-        "narHash": "sha256-ZHljmNlt19nSm0Mz8fx6QEhddKUkU4hhwFmfNmGn+EY=",
+        "lastModified": 1669833724,
+        "narHash": "sha256-/HEZNyGbnQecrgJnfE8d0WC5c1xuPSD2LUpB6YXlg4c=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "2ebb6c1e5ae402ba35cca5eec58385e5f1adea04",
+        "rev": "4d2b37a84fad1091b9de401eb450aae66f1a741e",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
+        "ref": "refs/tags/22.11",
         "repo": "nixpkgs",
-        "rev": "2ebb6c1e5ae402ba35cca5eec58385e5f1adea04",
         "type": "github"
       }
     },
     "root": {
       "inputs": {
+        "flake-compat": "flake-compat",
         "nixpkgs": "nixpkgs"
       }
     }
diff --git a/flake.nix b/flake.nix
index 4321ef4..199ab95 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,14 +1,27 @@
 {
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs?rev=2ebb6c1e5ae402ba35cca5eec58385e5f1adea04";
+    nixpkgs.url = "github:NixOS/nixpkgs?ref=refs/tags/22.11";
+    flake-compat = {
+      url = "github:edolstra/flake-compat";
+      flake = false;
+    };
   };
 
-  outputs = { self, nixpkgs }:
+  outputs = { self, nixpkgs, flake-compat }:
+  let
+    system = "x86_64-linux";
+    pkgs = nixpkgs.legacyPackages.${system};
+  in
   {
-    packages."x86_64-linux".default =
-      let
-        pkgs = nixpkgs.legacyPackages."x86_64-linux";
-      in pkgs.callPackage ./default.nix {};
-    defaultPackage.x86_64-linux = self.packages."x86_64-linux".default;
+    packages.${system}.default =
+      (pkgs.poetry2nix.mkPoetryApplication {
+        projectDir = ./.;
+      }).dependencyEnv;
+
+    defaultPackage.${system} = self.packages.${system}.default;
+
+    devShell.${system} = pkgs.mkShell {
+      buildInputs = [ (pkgs.python3.withPackages (p: [p.poetry])) ];
+    };
   };
 }
diff --git a/shell.nix b/shell.nix
index 453f5ac..e08ecf8 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,9 +1,8 @@
-{ pkgs ? import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/405d762a1a05ffed2ac820eb4bae4bc49bc3abf2.tar.gz") {}
+{ pkgs ? import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/2ebb6c1e5ae402ba35cca5eec58385e5f1adea04.tar.gz") {}
 }:
 
 pkgs.mkShell {
   buildInputs = [
-    pkgs.python3
-    pkgs.poetry
+    (pkgs.python3.withPackages (p: [p.poetry]))
   ];
 }