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/.gitignore b/.gitignore
index 839e6d2..791ec52 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 *.pdf
 /dist
 __pycache__
+.direnv
+result
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..6faeb4c
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,114 @@
+{
+  "nodes": {
+    "mdbook-nixdoc": {
+      "inputs": {
+        "nix-github-actions": [
+          "pyproject-nix",
+          "nix-github-actions"
+        ],
+        "nixpkgs": [
+          "pyproject-nix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1708395692,
+        "narHash": "sha256-smf0VmxGbjJDZqKvxxG3ZVqubgbVwAWG26wPo+BT/A0=",
+        "owner": "adisbladis",
+        "repo": "mdbook-nixdoc",
+        "rev": "d6a71b114b9221c0b4f20d31b81766d072cc26be",
+        "type": "github"
+      },
+      "original": {
+        "owner": "adisbladis",
+        "repo": "mdbook-nixdoc",
+        "type": "github"
+      }
+    },
+    "nix-github-actions": {
+      "inputs": {
+        "nixpkgs": [
+          "pyproject-nix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1720066371,
+        "narHash": "sha256-uPlLYH2S0ACj0IcgaK9Lsf4spmJoGejR9DotXiXSBZQ=",
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "rev": "622f829f5fe69310a866c8a6cd07e747c44ef820",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 0,
+        "narHash": "sha256-2ShmEaFi0kJVOEEu5gmlykN5dwjWYWYUJmlRTvZQRpU=",
+        "path": "/nix/store/d6533m6b80n3c9lia5kvaz59ad3fynwk-source",
+        "type": "path"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "pyproject-nix": {
+      "inputs": {
+        "mdbook-nixdoc": "mdbook-nixdoc",
+        "nix-github-actions": "nix-github-actions",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "treefmt-nix": "treefmt-nix"
+      },
+      "locked": {
+        "lastModified": 1724666263,
+        "narHash": "sha256-aDw2tDTErikTg3Hdvps0B8LxXWr2jHjA/y+f+aDLGfU=",
+        "owner": "nix-community",
+        "repo": "pyproject.nix",
+        "rev": "d6d664163b0eeed4d42fdb3c4fd8e0ce6d1ce192",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "pyproject.nix",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "pyproject-nix": "pyproject-nix"
+      }
+    },
+    "treefmt-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "pyproject-nix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1724338379,
+        "narHash": "sha256-kKJtaiU5Ou+e/0Qs7SICXF22DLx4V/WhG1P6+k4yeOE=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "070f834771efa715f3e74cd8ab93ecc96fabc951",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..2771641
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,34 @@
+{
+  description = "Command line utility for generating ASN labels for paperless with both a human-readable representation, as well as a QR code for machine consumption.";
+
+  inputs = {
+    pyproject-nix = {
+      url = "github:nix-community/pyproject.nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { nixpkgs, pyproject-nix, ... }:
+  let
+    project = pyproject-nix.lib.project.loadPyproject {
+      projectRoot = ./.;
+    };
+
+    pkgs = nixpkgs.legacyPackages.x86_64-linux;
+    python = pkgs.python3;
+  in
+  {
+    devShells.x86_64-linux.default =
+      let
+        arg = project.renderers.withPackages { inherit python; };
+        pythonEnv = python.withPackages arg;
+      in
+      pkgs.mkShell { packages = [ pythonEnv ]; };
+    packages.x86_64-linux.default =
+      let
+        attrs = project.renderers.buildPythonPackage { inherit python; };
+      in
+      python.pkgs.buildPythonPackage attrs;
+  };
+}
+