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/flake.lock b/flake.lock
new file mode 100644
index 0000000..63b373e
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,111 @@
+{
+  "nodes": {
+    "esp-idf": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1746690306,
+        "narHash": "sha256-bMp4BCrTOX7VDLVU8TzMSQj1hviBrARz9iiqNq6Vbnk=",
+        "owner": "mirrexagon",
+        "repo": "nixpkgs-esp-dev",
+        "rev": "6c34f2436015eb6c107970d9b88f3d5d4600c6fa",
+        "type": "github"
+      },
+      "original": {
+        "owner": "mirrexagon",
+        "repo": "nixpkgs-esp-dev",
+        "rev": "6c34f2436015eb6c107970d9b88f3d5d4600c6fa",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1726560853,
+        "narHash": "sha256-X6rJYSESBVr3hBoH0WbKE5KvhPU5bloyZ2L4K60/fPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "c1dfcf08411b08f6b8615f7d8971a2bfa81d5e8a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1729501122,
+        "narHash": "sha256-tScdcYQ37kMqlyqb5yizNDTKXZASLB4zHitlHwOg+/o=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "56c7c4a3f5fdbef5bf81c7d9c28fbb45dc626611",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixpkgs-unstable",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1759558742,
+        "narHash": "sha256-0IQRQijNKweSTrGXNOHWhKpZWUPrWdyaO31IziPU7wY=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "7c0ae904a7533f1496cdac2115bb3ed95658a0ef",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "esp-idf": "esp-idf",
+        "nixpkgs": "nixpkgs_2",
+        "systems": "systems_2"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1689347949,
+        "narHash": "sha256-12tWmuL2zgBgZkdoB6qXZsgJEH9LR3oUgpaQq2RbI80=",
+        "owner": "nix-systems",
+        "repo": "default-linux",
+        "rev": "31732fcf5e8fea42e59c2488ad31a0e651500f68",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default-linux",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..3fd24e2
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,35 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs";
+    systems.url = "github:nix-systems/default-linux";
+    esp-idf.url = "github:mirrexagon/nixpkgs-esp-dev?rev=6c34f2436015eb6c107970d9b88f3d5d4600c6fa";
+  };
+
+  outputs = { nixpkgs, systems, esp-idf, ... }: let
+    inherit (nixpkgs) lib;
+    eachSystem = lib.genAttrs (import systems);
+    pkgsFor = eachSystem (system:
+      import nixpkgs {
+        inherit system;
+      });
+  in {
+    devShells = eachSystem(system: let
+      inherit (esp-idf.packages.${system}) esp-idf-esp32;
+      pkgs = pkgsFor.${system};
+    in {
+      default = pkgs.mkShell {
+        inputsFrom = [
+          # for building and flashing the sketch
+          esp-idf-esp32
+        ];
+
+        packages = [
+          esp-idf-esp32
+
+          # for the `fontconvert.py` script of epdiy
+          (pkgs.python3.withPackages(ps: [ps.freetype-py]))
+        ];
+      };
+    });
+  };
+}
diff --git a/main/esp32-lua-example.c b/main/inkpot.c
similarity index 100%
rename from main/esp32-lua-example.c
rename to main/inkpot.c