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 8912d2b..479b8bd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,13 @@
 /source/build/
 s3.conf
 /vendor/
+
+# Devenv
+.devenv*
+devenv.local.nix
+
+# direnv
+.direnv
+
+# pre-commit
+.pre-commit-config.yaml
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..04466fa
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1722813957,
+        "narHash": "sha256-IAoYyYnED7P8zrBFMnmp7ydaJfwTnwcnqxUElC1I26Y=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "cb9a96f23c491c081b38eab96d22fa958043c9fa",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "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..1a108f9
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,24 @@
+# Do not edit this file. It is automatically generated by https://www.oliverdavies.uk/build-configs.
+{
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+
+  outputs =
+    { nixpkgs, ... }:
+    let
+      system = "x86_64-linux";
+      pkgs = nixpkgs.legacyPackages.${system};
+    in
+    {
+      devShells.${system}.default = pkgs.mkShell {
+        buildInputs = with pkgs; [
+          bashInteractive
+          nodePackages.pnpm
+          nodejs
+          php82
+          php82Packages.composer
+        ];
+      };
+
+      formatter.${system} = pkgs.nixfmt-rfc-style;
+    };
+}
diff --git a/notes.txt b/notes.txt
index 6566703..e4ed9d3 100644
--- a/notes.txt
+++ b/notes.txt
@@ -6,3 +6,7 @@ sculpin/sculpin-theme-composer-plugin contains a Composer plugin which is curren
 Do you trust "sculpin/sculpin-theme-composer-plugin" to execute code and wish to enable it now? (writes "allow-plugins" to composer.json) [y,n,d,?] y
 
 rm LICENSE README.md publish.sh s3.conf.dist s3-publish.sh
+
+devenv
+
+devenv init