diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..edc569b
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1766622938,
+        "narHash": "sha256-Eovt/DOCYjFFBZuYbbG9j5jhklzxdNbUGVYYxh3lG3s=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "5900a0a8850cbba98e16d5a7a6ed389402dfcf4f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-25.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..7dc8eb0
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,38 @@
+{
+  description = "Zamaan dev shell";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-25.11";
+  };
+
+  outputs = { self, nixpkgs }:
+    let
+      allSystems = [
+        "x86_64-linux"
+        "aarch64-linux"
+        "x86_64-darwin"
+        "aarch64-darwin"
+      ];
+
+      forAllSystems = f: nixpkgs.lib.genAttrs allSystems (system: f {
+        pkgs = import nixpkgs { inherit system; };
+      });
+    in
+    {
+      devShells = forAllSystems ({ pkgs }: {
+        default = pkgs.mkShell {
+          packages = with pkgs; [
+            nodejs_24
+            nodePackages.pnpm
+            sqlite
+          ];
+
+          shellHook = ''
+            echo "Zamaan dev shell"
+            echo "Node version: $(node --version)"
+            echo "pnpm version: $(pnpm --version)"
+          '';
+        };
+      });
+    };
+}
diff --git a/src/db/index.ts b/src/db/index.ts
index e89f19d..3608b40 100644
--- a/src/db/index.ts
+++ b/src/db/index.ts
@@ -3,6 +3,20 @@ import { drizzle } from 'drizzle-orm/better-sqlite3';
 import * as schema from './schema';
 import path from 'path';
 
-const dbUrl = process.env.DATABASE_URL || path.resolve(process.cwd(), 'zamaan.db');
-const sqlite = new Database(dbUrl, { readonly: false });
-export const db = drizzle(sqlite, { schema });
+let _db: ReturnType<typeof drizzle> | null = null;
+
+function initDb() {
+  if (!_db) {
+    const dbUrl = process.env.DATABASE_URL || path.resolve(process.cwd(), 'zamaan.db');
+    const sqlite = new Database(dbUrl, { readonly: false });
+    _db = drizzle(sqlite, { schema });
+  }
+  return _db;
+}
+
+export const db = new Proxy({} as ReturnType<typeof drizzle>, {
+  get(_target, prop) {
+    const database = initDb();
+    return database[prop as keyof typeof database];
+  }
+});