diff --git a/.gitignore b/.gitignore
index 349c2d2..54e16e8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 static/all.ics
+.envrc
 
 # Created by https://www.toptal.com/developers/gitignore/api/windows,linux,macos,hugo
 # Edit at https://www.toptal.com/developers/gitignore?templates=windows,linux,macos,hugo
@@ -100,4 +101,4 @@ shell.nix
 .direnv
 
 # Python
-.venv
\ No newline at end of file
+.venv
diff --git a/TODO.md b/TODO.md
index 7401796..10121f4 100644
--- a/TODO.md
+++ b/TODO.md
@@ -2,7 +2,8 @@
 
 - DSGVO-compliant Datenschutzerklärung reinbasteln
 - Entscheiden, welche Seiten sonst noch konvertiert werden sollen und welche in die ewigen Datengründe gehen können
-- add nix config to repo
+
+
 
 # Done
 
@@ -17,4 +18,3 @@
 - Bestehende Datengarten-Termine konvertieren
   - ggf. template mit frontmatter
 - Theme forken, alle assets sollten lokal gehosted sein und nicht von irgendwelchen CDNs bezogen werden (HTTP/2 ftw!)
-
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..6cc6b35
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1741332913,
+        "narHash": "sha256-ri1e8ZliWS3Jnp9yqpKApHaOo7KBN33W8ECAKA4teAQ=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "20755fa05115c84be00b04690630cb38f0a203ad",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-24.11",
+        "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..a52b5ad
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,40 @@
+{
+  description = "A flake containing a development environment for the CCCB website.";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
+  };
+
+  outputs =
+    { self, nixpkgs }:
+    let
+      forAllSystems =
+        f:
+        nixpkgs.lib.genAttrs nixpkgs.lib.systems.flakeExposed (
+          system:
+          f rec {
+            pkgs = nixpkgs.legacyPackages.${system};
+            inherit system;
+          }
+        );
+    in
+    {
+      devShells = forAllSystems (
+        { pkgs, ... }:
+        {
+          default = pkgs.mkShell rec {
+            packages = with pkgs; [
+              hugo
+              go
+              (pkgs.python3.withPackages (python-pkgs: [
+                python-pkgs.icalendar
+                python-pkgs.pytz
+              ]))
+            ];
+          };
+        }
+      );
+
+      formatter = forAllSystems ({ pkgs, ... }: pkgs.nixfmt-rfc-style);
+    };
+}