diff --git a/.gitignore b/.gitignore
index 7b314d1..3208f1e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,3 +23,4 @@ metals.sbt
 
 # npm
 node_modules/
+/.direnv/
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..f78eef0
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,143 @@
+{
+  "nodes": {
+    "devshell": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": [
+          "typelevel-nix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1717408969,
+        "narHash": "sha256-Q0OEFqe35fZbbRPPRdrjTUUChKVhhWXz3T9ZSKmaoVY=",
+        "owner": "numtide",
+        "repo": "devshell",
+        "rev": "1ebbe68d57457c8cae98145410b164b5477761f4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "devshell",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1701680307,
+        "narHash": "sha256-kAuep2h5ajznlPMD9rnQyffWG8EM/C73lejGofXvdM8=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "4022d587cbbfd70fe950c1e2083a02621806a725",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "flake-utils_2": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1720368505,
+        "narHash": "sha256-5r0pInVo5d6Enti0YwUSQK4TebITypB42bWy5su3MrQ=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "ab82a9612aa45284d4adf69ee81871a389669a9e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": [
+          "typelevel-nix",
+          "flake-utils"
+        ],
+        "nixpkgs": [
+          "typelevel-nix",
+          "nixpkgs"
+        ],
+        "typelevel-nix": "typelevel-nix"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "typelevel-nix": {
+      "inputs": {
+        "devshell": "devshell",
+        "flake-utils": "flake-utils_2",
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1720469922,
+        "narHash": "sha256-+uZUK1fRJp9Pqab41Bez0Ox1HCuolofVsdBxN2MK/j4=",
+        "owner": "typelevel",
+        "repo": "typelevel-nix",
+        "rev": "56599042bf39e03933e81fae63d9515ec6bc3542",
+        "type": "github"
+      },
+      "original": {
+        "owner": "typelevel",
+        "repo": "typelevel-nix",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
index 8a75b90..757d1a9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -10,7 +10,7 @@
       let
         pkgs = import nixpkgs {
           inherit system;
-          overlays = [ typelevel-nix.overlay ];
+          overlays = [ typelevel-nix.overlays.default ];
         };
       in
       {