diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..a6f5fbf
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,94 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1637014545,
+        "narHash": "sha256-26IZAc5yzlD9FlDT54io1oqG/bBoyka+FJk5guaX4x4=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "bba5dcc8e0b20ab664967ad83d24d64cb64ec4f4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1644151317,
+        "narHash": "sha256-TpXGBYCFKvEN7Q+To45rn4kqTbLPY4f56rF6ymUGGRE=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "942b0817e898262cc6e3f0a5f706ce09d8f749f1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1637453606,
+        "narHash": "sha256-Gy6cwUswft9xqsjWxFYEnx/63/qzaFUwatcbV5GF/GQ=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "8afc4e543663ca0a6a4f496262cd05233737e732",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay",
+        "utils": "utils"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1644287662,
+        "narHash": "sha256-KkdR8VSpsOXb2ZlOeBrt5sF5a9dfAPW5KH0zrInoVl0=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "2eae19e246433530998cbf239d5505b7b87bc854",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "utils": {
+      "locked": {
+        "lastModified": 1644229661,
+        "narHash": "sha256-1YdnJAsNy69bpcjuoKdOYQX0YxZBiCYZo4Twxerqv7k=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "3cecb5b042f7f209c56ffd8371b2711a290ec797",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..1da4c16
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,59 @@
+{
+  description = "Leet your code in command-line.";
+
+  inputs.nixpkgs.url      = "github:NixOS/nixpkgs/nixpkgs-unstable";
+  inputs.rust-overlay.url = "github:oxalica/rust-overlay";
+  inputs.utils.url        = "github:numtide/flake-utils";
+
+  outputs = { self, nixpkgs, rust-overlay, utils, ... }:
+    utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; overlays = [ rust-overlay.overlay ]; };
+
+        platform = with pkgs; makeRustPlatform {
+          rustc = rust-bin.nightly.latest.minimal;
+          cargo = rust-bin.nightly.latest.minimal;
+        };
+        package = with pkgs; platform.buildRustPackage rec {
+          pname = "leetcode-cli";
+          version = "0.3.10";
+
+          src = fetchCrate {
+            inherit pname version;
+            sha256 = "SkJLA49AXNTpiWZByII2saYLyN3bAAJTlCvhamlOEXA=";
+          };
+
+          cargoSha256 = "xhKF4qYOTdt8iCSPY5yT8tH3l54HdkOAIS2SBGzqsdo=";
+
+          # a nightly compiler is required unless we use this cheat code.
+          RUSTC_BOOTSTRAP = 0;
+
+          # CFG_RELEASE = "${rustPlatform.rust.rustc.version}-nightly";
+          CFG_RELEASE_CHANNEL = "ngihtly";
+
+          nativeBuildInputs = [
+            pkg-config
+            rust-bin.stable.latest.default
+          ];
+
+          buildInputs = [
+            openssl
+            dbus
+            sqlite
+          ] ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.Security ];
+
+          meta = with pkgs.lib; {
+            description = "Leet your code in command-line.";
+            homepage = "https://github.com/clearloop/leetcode-cli";
+            licenses = licenses.mit;
+            maintainers = with maintainers; [ congee ];
+            mainProgram = "leetcode";
+          };
+        };
+      in
+      {
+        defaultPackage = package;
+        overlay = final: prev: { leetcode-cli = package; };
+      }
+    );
+}