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..3e87ea1
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,59 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1694529238,
+        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1697009197,
+        "narHash": "sha256-viVRhBTFT8fPJTb1N3brQIpFZnttmwo3JVKNuWRVc3s=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "01441e14af5e29c9d27ace398e6dd0b293e25a54",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..fc8d409
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,30 @@
+{
+  description = "fox32 tools";
+
+  inputs = {
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (sys:
+      let pkgs = import nixpkgs { system = sys; };
+      in rec {
+        packages.gfx2inc = pkgs.rustPlatform.buildRustPackage rec {
+          pname = "gfx2inc";
+          version = "0.1.0";
+
+          src = ./gfx2inc;
+          cargoLock = { lockFile = ./gfx2inc/Cargo.lock; };
+
+          NIX_SEMVER = version;
+          NIX_GIT_SHA_SHORT = if self ? rev then builtins.substring 0 7 self.rev else "dirty";
+        };
+        packages.default = packages.gfx2inc;
+
+        devShells.default = pkgs.mkShell {
+          packages = [ pkgs.cargo ];
+        };
+
+      }
+    );
+}
diff --git a/gfx2inc/Cargo.lock b/gfx2inc/Cargo.lock
index e729d4c..06b6566 100644
--- a/gfx2inc/Cargo.lock
+++ b/gfx2inc/Cargo.lock
@@ -8,18 +8,6 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
-[[package]]
-name = "adler32"
-version = "1.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aae1277d39aeec15cb388266ecc24b11c80469deae6067e17a1a7aa9e5c1f234"
-
-[[package]]
-name = "anyhow"
-version = "1.0.58"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb07d2053ccdbe10e2af2995a2f116c1330396493dc1269f6a91d0ae82e19704"
-
 [[package]]
 name = "autocfg"
 version = "1.1.0"
@@ -34,24 +22,15 @@ checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
 name = "bytemuck"
-version = "1.9.1"
+version = "1.14.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cdead85bdec19c194affaeeb670c0e41fe23de31459efd1c174d049269cf02cc"
+checksum = "ed2490600f404f2b94c167e31d3ed1d5f3c225a0f3b80230053b3e0b7b962bd9"
 
 [[package]]
 name = "byteorder"
-version = "1.4.3"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
-
-[[package]]
-name = "cc"
-version = "1.0.73"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2fff2a6927b3bb87f9595d67196a70493f627687a71d87a0d692242c33f58c11"
-dependencies = [
- "jobserver",
-]
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
 
 [[package]]
 name = "cfg-if"
@@ -59,19 +38,6 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
-[[package]]
-name = "chrono"
-version = "0.4.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "670ad68c9088c2a963aaa298cb369688cf3f9465ce5e2d4ca10e6e0098a1ce73"
-dependencies = [
- "libc",
- "num-integer",
- "num-traits",
- "time",
- "winapi",
-]
-
 [[package]]
 name = "color_quant"
 version = "1.1.0"
@@ -88,422 +54,78 @@ dependencies = [
 ]
 
 [[package]]
-name = "deflate"
-version = "1.0.0"
+name = "fdeflate"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c86f7e25f518f4b81808a2cf1c50996a61f5c2eb394b2393bd87f2a4780a432f"
+checksum = "4f9bfee30e4dedf0ab8b422f03af778d9612b63f502710fc500a334ebe2de645"
 dependencies = [
- "adler32",
+ "simd-adler32",
 ]
 
 [[package]]
-name = "enum-iterator"
-version = "0.8.1"
+name = "flate2"
+version = "1.0.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2953d1df47ac0eb70086ccabf0275aa8da8591a28bd358ee2b52bd9f9e3ff9e9"
+checksum = "46303f565772937ffe1d394a4fac6f411c6013172fadde9dcdb1e147a086940e"
 dependencies = [
- "enum-iterator-derive",
-]
-
-[[package]]
-name = "enum-iterator-derive"
-version = "0.8.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8958699f9359f0b04e691a13850d48b7de329138023876d07cbd024c2c820598"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
-[[package]]
-name = "form_urlencoded"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5fc25a87fa4fd2094bffb06925852034d90a17f0d1e05197d4956d3555752191"
-dependencies = [
- "matches",
- "percent-encoding",
-]
-
-[[package]]
-name = "getset"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e45727250e75cc04ff2846a66397da8ef2b3db8e40e0cef4df67950a07621eb9"
-dependencies = [
- "proc-macro-error",
- "proc-macro2",
- "quote",
- "syn",
+ "crc32fast",
+ "miniz_oxide",
 ]
 
 [[package]]
 name = "gfx2inc"
 version = "0.1.0"
 dependencies = [
- "anyhow",
  "image",
- "vergen",
-]
-
-[[package]]
-name = "git2"
-version = "0.14.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d0155506aab710a86160ddb504a480d2964d7ab5b9e62419be69e0032bc5931c"
-dependencies = [
- "bitflags",
- "libc",
- "libgit2-sys",
- "log",
- "url",
-]
-
-[[package]]
-name = "idna"
-version = "0.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "418a0a6fab821475f634efe3ccc45c013f742efe03d853e8d3355d5cb850ecf8"
-dependencies = [
- "matches",
- "unicode-bidi",
- "unicode-normalization",
 ]
 
 [[package]]
 name = "image"
-version = "0.24.2"
+version = "0.24.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28edd9d7bc256be2502e325ac0628bde30b7001b9b52e0abe31a1a9dc2701212"
+checksum = "034bbe799d1909622a74d1193aa50147769440040ff36cb2baa947609b0a4e23"
 dependencies = [
  "bytemuck",
  "byteorder",
  "color_quant",
- "num-iter",
- "num-rational",
  "num-traits",
  "png",
 ]
 
-[[package]]
-name = "jobserver"
-version = "0.1.24"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "af25a77299a7f711a01975c35a6a424eb6862092cc2d6c72c4ed6cbc56dfc1fa"
-dependencies = [
- "libc",
-]
-
-[[package]]
-name = "libc"
-version = "0.2.126"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "349d5a591cd28b49e1d1037471617a32ddcda5731b99419008085f72d5a53836"
-
-[[package]]
-name = "libgit2-sys"
-version = "0.13.4+1.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d0fa6563431ede25f5cc7f6d803c6afbc1c5d3ad3d4925d12c882bf2b526f5d1"
-dependencies = [
- "cc",
- "libc",
- "libz-sys",
- "pkg-config",
-]
-
-[[package]]
-name = "libz-sys"
-version = "1.1.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9702761c3935f8cc2f101793272e202c72b99da8f4224a19ddcf1279a6450bbf"
-dependencies = [
- "cc",
- "libc",
- "pkg-config",
- "vcpkg",
-]
-
-[[package]]
-name = "log"
-version = "0.4.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
-dependencies = [
- "cfg-if",
-]
-
-[[package]]
-name = "matches"
-version = "0.1.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a3e378b66a060d48947b590737b30a1be76706c8dd7b8ba0f2fe3989c68a853f"
-
 [[package]]
 name = "miniz_oxide"
-version = "0.5.3"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f5c75688da582b8ffc1f1799e9db273f32133c49e048f614d22ec3256773ccc"
+checksum = "e7810e0be55b428ada41041c41f32c9f1a42817901b4ccf45fa3d4b6561e74c7"
 dependencies = [
  "adler",
-]
-
-[[package]]
-name = "num-integer"
-version = "0.1.45"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "225d3389fb3509a24c93f5c29eb6bde2586b98d9f016636dff58d7c6f7569cd9"
-dependencies = [
- "autocfg",
- "num-traits",
-]
-
-[[package]]
-name = "num-iter"
-version = "0.1.43"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7d03e6c028c5dc5cac6e2dec0efda81fc887605bb3d884578bb6d6bf7514e252"
-dependencies = [
- "autocfg",
- "num-integer",
- "num-traits",
-]
-
-[[package]]
-name = "num-rational"
-version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0638a1c9d0a3c0914158145bc76cff373a75a627e6ecbfb71cbe6f453a5a19b0"
-dependencies = [
- "autocfg",
- "num-integer",
- "num-traits",
+ "simd-adler32",
 ]
 
 [[package]]
 name = "num-traits"
-version = "0.2.15"
+version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "578ede34cf02f8924ab9447f50c28075b4d3e5b269972345e7e0372b38c6cdcd"
+checksum = "39e3200413f237f41ab11ad6d161bc7239c84dcb631773ccd7de3dfe4b5c267c"
 dependencies = [
  "autocfg",
 ]
 
-[[package]]
-name = "percent-encoding"
-version = "2.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"
-
-[[package]]
-name = "pkg-config"
-version = "0.3.25"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1df8c4ec4b0627e53bdf214615ad287367e482558cf84b109250b37464dc03ae"
-
 [[package]]
 name = "png"
-version = "0.17.5"
+version = "0.17.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dc38c0ad57efb786dd57b9864e5b18bae478c00c824dc55a38bbc9da95dde3ba"
+checksum = "1f6c3c3e617595665b8ea2ff95a86066be38fb121ff920a9c0eb282abcd1da5a"
 dependencies = [
  "bitflags",
  "crc32fast",
- "deflate",
+ "fdeflate",
+ "flate2",
  "miniz_oxide",
 ]
 
 [[package]]
-name = "proc-macro-error"
-version = "1.0.4"
+name = "simd-adler32"
+version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
-dependencies = [
- "proc-macro-error-attr",
- "proc-macro2",
- "quote",
- "syn",
- "version_check",
-]
-
-[[package]]
-name = "proc-macro-error-attr"
-version = "1.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
-dependencies = [
- "proc-macro2",
- "quote",
- "version_check",
-]
-
-[[package]]
-name = "proc-macro2"
-version = "1.0.40"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd96a1e8ed2596c337f8eae5f24924ec83f5ad5ab21ea8e455d3566c69fbcaf7"
-dependencies = [
- "unicode-ident",
-]
-
-[[package]]
-name = "quote"
-version = "1.0.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3bcdf212e9776fbcb2d23ab029360416bb1706b1aea2d1a5ba002727cbcab804"
-dependencies = [
- "proc-macro2",
-]
-
-[[package]]
-name = "rustversion"
-version = "1.0.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a0a5f7c728f5d284929a1cccb5bc19884422bfe6ef4d6c409da2c41838983fcf"
-
-[[package]]
-name = "syn"
-version = "1.0.98"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c50aef8a904de4c23c788f104b7dddc7d6f79c647c7c8ce4cc8f73eb0ca773dd"
-dependencies = [
- "proc-macro2",
- "quote",
- "unicode-ident",
-]
-
-[[package]]
-name = "thiserror"
-version = "1.0.31"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bd829fe32373d27f76265620b5309d0340cb8550f523c1dda251d6298069069a"
-dependencies = [
- "thiserror-impl",
-]
-
-[[package]]
-name = "thiserror-impl"
-version = "1.0.31"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0396bc89e626244658bef819e22d0cc459e795a5ebe878e6ec336d1674a8d79a"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
-[[package]]
-name = "time"
-version = "0.1.44"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255"
-dependencies = [
- "libc",
- "wasi",
- "winapi",
-]
-
-[[package]]
-name = "tinyvec"
-version = "1.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87cc5ceb3875bb20c2890005a4e226a4651264a5c75edb2421b52861a0a0cb50"
-dependencies = [
- "tinyvec_macros",
-]
-
-[[package]]
-name = "tinyvec_macros"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
-
-[[package]]
-name = "unicode-bidi"
-version = "0.3.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "099b7128301d285f79ddd55b9a83d5e6b9e97c92e0ea0daebee7263e932de992"
-
-[[package]]
-name = "unicode-ident"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5bd2fe26506023ed7b5e1e315add59d6f584c621d037f9368fea9cfb988f368c"
-
-[[package]]
-name = "unicode-normalization"
-version = "0.1.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81dee68f85cab8cf68dec42158baf3a79a1cdc065a8b103025965d6ccb7f6cbd"
-dependencies = [
- "tinyvec",
-]
-
-[[package]]
-name = "url"
-version = "2.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a507c383b2d33b5fc35d1861e77e6b383d158b2da5e14fe51b83dfedf6fd578c"
-dependencies = [
- "form_urlencoded",
- "idna",
- "matches",
- "percent-encoding",
-]
-
-[[package]]
-name = "vcpkg"
-version = "0.2.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
-
-[[package]]
-name = "vergen"
-version = "6.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3893329bee75c101278e0234b646fa72221547d63f97fb66ac112a0569acd110"
-dependencies = [
- "anyhow",
- "cfg-if",
- "chrono",
- "enum-iterator",
- "getset",
- "git2",
- "rustversion",
- "thiserror",
-]
-
-[[package]]
-name = "version_check"
-version = "0.9.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
-
-[[package]]
-name = "wasi"
-version = "0.10.0+wasi-snapshot-preview1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
-
-[[package]]
-name = "winapi"
-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
-dependencies = [
- "winapi-i686-pc-windows-gnu",
- "winapi-x86_64-pc-windows-gnu",
-]
-
-[[package]]
-name = "winapi-i686-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
-
-[[package]]
-name = "winapi-x86_64-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+checksum = "d66dc143e6b11c1eddc06d5c423cfc97062865baf299914ab64caa38182078fe"
diff --git a/gfx2inc/Cargo.toml b/gfx2inc/Cargo.toml
index e6e50c2..914b610 100644
--- a/gfx2inc/Cargo.toml
+++ b/gfx2inc/Cargo.toml
@@ -5,7 +5,3 @@ edition = "2021"
 
 [dependencies]
 image = { version = "0.24.2", default-features = false, features = ["png"] }
-
-[build-dependencies]
-anyhow = "1.0"
-vergen = { version = "6", default-features = false, features = ["build", "git"] }
diff --git a/gfx2inc/build.rs b/gfx2inc/build.rs
deleted file mode 100644
index d4fafec..0000000
--- a/gfx2inc/build.rs
+++ /dev/null
@@ -1,8 +0,0 @@
-use anyhow::Result;
-use vergen::{Config, ShaKind, vergen};
-
-fn main() -> Result<()> {
-    let mut config = Config::default();
-    *config.git_mut().sha_kind_mut() = ShaKind::Short;
-    vergen(config)
-}
diff --git a/gfx2inc/src/main.rs b/gfx2inc/src/main.rs
index 5d56415..2925b02 100644
--- a/gfx2inc/src/main.rs
+++ b/gfx2inc/src/main.rs
@@ -8,7 +8,10 @@ use image::{DynamicImage, GenericImageView, Pixel};
 use image::io::Reader as ImageReader;
 
 fn main() {
-    let version_string = format!("gfx2inc {} ({})", env!("VERGEN_BUILD_SEMVER"), env!("VERGEN_GIT_SHA_SHORT"));
+    let version_string = match (option_env!("NIX_SEMVER"), option_env!("NIX_GIT_SHA_SHORT")) {
+        (Some(semver), Some(sha)) => format!("gfx2inc {semver} ({sha})"),
+        _ => format!("fox32asm (dev)"),
+    };
     println!("{}", version_string);
 
     let args: Vec<String> = env::args().collect();