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.nix b/flake.nix
new file mode 100644
index 0000000..dc80c44
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,39 @@
+{
+  description = "idx-cli — CLI tool for Indonesian stock market (IDX) analysis";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, flake-utils, rust-overlay }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        overlays = [ (import rust-overlay) ];
+        pkgs = import nixpkgs { inherit system overlays; };
+        rustToolchain = pkgs.rust-bin.stable.latest.default.override {
+          extensions = [ "rust-src" "rust-analyzer" ];
+        };
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            rustToolchain
+            pkg-config
+            openssl
+            sqlite
+            cargo-watch
+            cargo-nextest
+          ];
+
+          env = {
+            RUST_BACKTRACE = "1";
+          };
+        };
+      }
+    );
+}