diff --git a/.cargo/config.toml b/.cargo/config.toml
deleted file mode 100644
index 3157afb..0000000
--- a/.cargo/config.toml
+++ /dev/null
@@ -1,3 +0,0 @@
-[target.x86_64-unknown-linux-gnu]
-linker = "clang"
-
diff --git a/flake.lock b/flake.lock
index e3989d7..13e4d53 100644
--- a/flake.lock
+++ b/flake.lock
@@ -28,11 +28,11 @@
         "rust-analyzer-src": "rust-analyzer-src"
       },
       "locked": {
-        "lastModified": 1705731714,
-        "narHash": "sha256-aMeN/ASG4n7RIIPLiy+txoMdDTvIcaRDX6acbeeRtEU=",
+        "lastModified": 1705818179,
+        "narHash": "sha256-eNlzk9S9MiV8h1Z4vYpNWHrgFh0wkJCoSPDLhMYEJhU=",
         "owner": "nix-community",
         "repo": "fenix",
-        "rev": "712f25ec7e1f5839d486b246a5afa5e31f5df6ff",
+        "rev": "40f11d5591036cd03dffaae9aea1d3fec3c62b54",
         "type": "github"
       },
       "original": {
@@ -61,11 +61,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1705496572,
-        "narHash": "sha256-rPIe9G5EBLXdBdn9ilGc0nq082lzQd0xGGe092R/5QE=",
+        "lastModified": 1705677747,
+        "narHash": "sha256-eyM3okYtMgYDgmYukoUzrmuoY4xl4FUujnsv/P6I/zI=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "842d9d80cfd4560648c785f8a4e6f3b096790e19",
+        "rev": "bbe7d8f876fbbe7c959c90ba2ae2852220573261",
         "type": "github"
       },
       "original": {
@@ -85,11 +85,11 @@
     "rust-analyzer-src": {
       "flake": false,
       "locked": {
-        "lastModified": 1705697225,
-        "narHash": "sha256-eLMwix3LPsgqnbdLMWivBCSBrWnaAA50JtMNnInTopg=",
+        "lastModified": 1705767842,
+        "narHash": "sha256-lBvKPxeJ/UJPBxncu622hts0xbYfmo2GYu5E7K3MZt0=",
         "owner": "rust-lang",
         "repo": "rust-analyzer",
-        "rev": "67cfbf231c1e2ba3129529de950d1c4ca7921404",
+        "rev": "a9116523604c998e7781f60d3b5a6f586e0414a9",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 596090b..38bd842 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,53 +1,55 @@
 {
   inputs = {
-    crane = {
-      url = "github:ipetkov/crane";
-      inputs = {
-        flake-utils.follows = "flake-utils";
-        nixpkgs.follows = "nixpkgs";
-      };
-    };
-    fenix = {
-      url = "github:nix-community/fenix";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
+    crane.url = "github:ipetkov/crane";
+    crane.inputs.nixpkgs.follows = "nixpkgs";
+    fenix.url = "github:nix-community/fenix";
+    fenix.inputs.nixpkgs.follows = "nixpkgs";
     flake-utils.url = "github:numtide/flake-utils";
     nixpkgs.url = "nixpkgs/nixos-unstable";
   };
 
-  outputs = { self, crane, fenix, flake-utils, nixpkgs }:
+  outputs = { self, crane, flake-utils, nixpkgs, ... }@inputs:
     flake-utils.lib.eachDefaultSystem (system:
       let
-        pkgs = (import nixpkgs) {
-          inherit system;
-        };
-        toolchain = fenix.packages.${system}.stable;
+        inherit (pkgs) lib;
+        pkgs = import nixpkgs { inherit system; };
+        fenix = inputs.fenix.packages.${system};
         craneLib = crane.lib.${system}.overrideToolchain toolchain.toolchain;
+        mkSrc = extraPaths: with lib.fileset; let
+          root = ./.;
+          rustFiles = fromSource (craneLib.cleanCargoSource root);
+          fileset = union rustFiles (unions extraPaths);
+        in
+        toSource { inherit root fileset; };
+
+        ## Customize here ##
+        toolchain = fenix.complete; # or fenix.stable;
+        stdenv = pkgs.stdenvAdapters.useMoldLinker pkgs.stdenv;
       in
       {
-        packages.default =
-          let
-            inherit (pkgs.lib) fileset;
-          in
-          craneLib.buildPackage {
-            src = fileset.toSource {
-              root = ./.;
-              fileset = fileset.intersection
-                (fileset.difference ./.
-                  (fileset.unions [ ./.cargo ./flake.nix ./flake.lock ./.envrc ]))
-                (fileset.gitTracked ./.);
-            };
-          };
+        packages.default = craneLib.buildPackage {
+          inherit stdenv;
+          src = mkSrc [ ./templates ];
+          strictDeps = true;
+          buildInputs = pkgs.stdenv.isDarwin [
+            pkgs.libiconv
+          ];
+        };
 
-        devShell = pkgs.mkShell.override
+        devShells.default = pkgs.mkShell.override { inherit stdenv; }
           {
-            stdenv = pkgs.stdenvAdapters.useMoldLinker pkgs.clangStdenv;
-          }
-          {
-            nativeBuildInputs = with toolchain;
-              [ rustc cargo rust-analyzer clippy ] ++ (with pkgs;
-              [ entr ]
-              );
+            nativeBuildInputs = with pkgs; [
+              entr
+              htmx-lsp
+            ] ++ (with toolchain; [
+              cargo
+              clippy
+              rustfmt
+              rustc
+              fenix.rust-analyzer
+            ]);
+            RUST_SRC_PATH = "${toolchain.rust-src}/lib/rustlib/src/rust/library";
           };
-      });
+      }
+    );
 }
diff --git a/rustfmt.toml b/rustfmt.toml
new file mode 100644
index 0000000..3a26366
--- /dev/null
+++ b/rustfmt.toml
@@ -0,0 +1 @@
+edition = "2021"
diff --git a/src/main.rs b/src/main.rs
index 0779dee..41980b4 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,12 +1,12 @@
 use std::sync::Mutex;
 
-use actix_web::{App, HttpServer};
 use actix_web::web;
+use actix_web::{App, HttpServer};
 use askama::Template;
 
 #[derive(Debug)]
 struct AppState {
-    counter: Mutex<i32>
+    counter: Mutex<i32>,
 }
 
 #[derive(Template)]
@@ -25,7 +25,9 @@ struct IndexTemplate {
 async fn index(data: web::Data<AppState>) -> impl actix_web::Responder {
     let counter = data.counter.lock().unwrap();
     let counter_template = CounterTemplate { counter: *counter };
-    IndexTemplate { counter: counter_template }
+    IndexTemplate {
+        counter: counter_template,
+    }
 }
 
 #[actix_web::post("/api/increment")]
@@ -47,10 +49,10 @@ async fn main() -> std::io::Result<()> {
     std::env::set_var("RUST_LOG", "debug");
     env_logger::init();
     println!("Starting webserver on port 8080");
-    let app_state = web::Data::new( AppState {
-        counter: Mutex::new(0)
+    let app_state = web::Data::new(AppState {
+        counter: Mutex::new(0),
     });
-    HttpServer::new(move|| {
+    HttpServer::new(move || {
         App::new()
             .app_data(app_state.clone())
             .service(index)