diff --git a/.envrc-nix b/.envrc-nix
new file mode 100644
index 00000000..1d953f4b
--- /dev/null
+++ b/.envrc-nix
@@ -0,0 +1 @@
+use nix
diff --git a/.gitignore b/.gitignore
index 93c801d9..66ae8e6d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,4 +6,6 @@
 /zmk-config
 /build
 *.DS_Store
-__pycache__
\ No newline at end of file
+__pycache__
+/.direnv
+.envrc
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 00000000..95b64bf1
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,43 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1638122382,
+        "narHash": "sha256-sQzZzAbvKEqN9s0bzWuYmRaA03v40gaJ4+iL1LXjaeI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "74f7e4319258e287b0f9cb95426c9853b282730b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1638910453,
+        "narHash": "sha256-fofA4tsAAdNgE+9Py0VsVbyX2ZQkgV+CVqQKGBA/dLE=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "f225322e3bea8638304adfcf415cd11de99f2208",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 00000000..1499b6c0
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,11 @@
+{
+  description = "# Zephyr™ Mechanical Keyboard (ZMK) Firmware";
+
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let pkgs = nixpkgs.legacyPackages.${system};
+      in { devShell = import ./shell.nix { inherit pkgs; }; });
+}
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 00000000..db301abf
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,34 @@
+{ pkgs ? import <nixpkgs> { } }:
+
+with pkgs;
+
+let inherit (lib) ;
+  mach-nix = import (builtins.fetchGit {
+    url = "https://github.com/DavHau/mach-nix";
+    ref = "master";
+  }) {
+    python = "python3";
+  };
+  zephyr-requirements = fetchurl {
+    url = "https://raw.githubusercontent.com/zephyrproject-rtos/zephyr/v2.5.0/scripts/requirements-base.txt";
+    sha256 = "919a78ba9457a8e55451450329158ff7fdcbc4a2ddb0dd76ea804c3b04a3c6c6";
+  };
+  python-pkgs = mach-nix.mkPython rec {
+    requirements = builtins.readFile zephyr-requirements;
+  };
+in mkShell {
+  buildInputs = [
+    cmake
+    ccache
+    ninja
+    dtc
+    dfu-util
+    gcc-arm-embedded
+    python-pkgs
+  ];
+
+  shellHook = ''
+    export ZEPHYR_TOOLCHAIN_VARIANT=gnuarmemb
+    export GNUARMEMB_TOOLCHAIN_PATH=${pkgs.gcc-arm-embedded}
+  '';
+}