diff --git a/darwin/bootstrap.nix b/darwin/bootstrap.nix
index b323ce1..627a143 100644
--- a/darwin/bootstrap.nix
+++ b/darwin/bootstrap.nix
@@ -1,5 +1,4 @@
-{ config, pkgs, lib, ... }:
-{
+{ config, pkgs, lib, ... }: {
   # Nix configuration ------------------------------------------------------------------------------
 
   nix.settings = {
@@ -20,14 +19,15 @@
       "pre-commit-hooks.cachix.org-1:Pkk3Panw5AW24TOv6kz3PvLhlH8puAsJTBbOPmBo7Rc="
       "iohk.cachix.org-1:DpRUyj7h7V830dp/i6Nti+NEO2/nhblbov/8MW7Rqoo="
     ];
-    trusted-users = [
-      "@admin"
-    ];
+    trusted-users = [ "@admin" ];
     # TODO: remove and replace with a launchd job
     # see https://github.com/NixOS/nix/issues/7273
     auto-optimise-store = true;
     experimental-features = [ "nix-command" "flakes" ];
-    extra-platforms = lib.mkIf (pkgs.system == "aarch64-darwin") [ "x86_64-darwin" "aarch64-darwin" ];
+    extra-platforms = lib.mkIf (pkgs.system == "aarch64-darwin") [
+      "x86_64-darwin"
+      "aarch64-darwin"
+    ];
   };
   nix.configureBuildUsers = true;
 
@@ -35,12 +35,8 @@
   services.nix-daemon.enable = true;
 
   # Make Fish the default shell
-  environment.shells = lib.mkForce (builtins.attrValues {
-    inherit (pkgs)
-      bashInteractive
-      fish
-      zsh;
-  });
+  environment.shells = lib.mkForce
+    (builtins.attrValues { inherit (pkgs) bashInteractive fish zsh; });
 
   programs.fish.enable = true;
   programs.fish.useBabelfish = true;
diff --git a/darwin/homebrew.nix b/darwin/homebrew.nix
index 619d54d..f3a2c28 100644
--- a/darwin/homebrew.nix
+++ b/darwin/homebrew.nix
@@ -2,8 +2,7 @@
 let
   inherit (config.users) primaryUser;
   caskPresent = cask: lib.any (x: x.name == cask) config.homebrew.casks;
-in
-{
+in {
   environment.shellInit = ''
     eval "$(${config.homebrew.brewPrefix}/brew shellenv)"
   '';
@@ -87,19 +86,16 @@ in
     # "zoom"
   ];
 
-  home-manager.users.${primaryUser.username} =
-    let
-      socket = "${primaryUser.homeDirectory}/Library/Containers/com.maxgoedjen.Secretive.SecretAgent/Data/socket.ssh";
-    in
-    lib.mkIf (caskPresent "secretive" && config ? home-manager) {
-      home.sessionVariables.SSH_AUTH_SOCK = socket;
-      programs.ssh = {
-        enable = true;
-        matchBlocks."*".extraOptions = {
-          IdentityAgent = socket;
-        };
-      };
+  home-manager.users.${primaryUser.username} = let
+    socket =
+      "${primaryUser.homeDirectory}/Library/Containers/com.maxgoedjen.Secretive.SecretAgent/Data/socket.ssh";
+  in lib.mkIf (caskPresent "secretive" && config ? home-manager) {
+    home.sessionVariables.SSH_AUTH_SOCK = socket;
+    programs.ssh = {
+      enable = true;
+      matchBlocks."*".extraOptions = { IdentityAgent = socket; };
     };
+  };
 
   # For cli packages that aren't currently available for macOS in `nixpkgs`.Packages should be
   # installed in `../home/programs.nix` whenever possible.
diff --git a/default.nix b/default.nix
index cfdc9ff..1ec8604 100644
--- a/default.nix
+++ b/default.nix
@@ -1,14 +1,7 @@
 # See https://nixos.wiki/wiki/Flakes#Using_flakes_project_from_a_legacy_Nix
-(import
-  (
-    let
-      lock = builtins.fromJSON (builtins.readFile ./flake.lock);
-    in
-    fetchTarball {
-      url = "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
-      sha256 = lock.nodes.flake-compat.locked.narHash;
-    }
-  )
-  {
-    src = ./.;
-  }).defaultNix
+(import (let lock = builtins.fromJSON (builtins.readFile ./flake.lock);
+in fetchTarball {
+  url =
+    "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
+  sha256 = lock.nodes.flake-compat.locked.narHash;
+}) { src = ./.; }).defaultNix
diff --git a/flake.nix b/flake.nix
index b605910..b062e95 100644
--- a/flake.nix
+++ b/flake.nix
@@ -42,12 +42,7 @@
     starship-src.flake = false;
   };
 
-  outputs =
-    { self
-    , flake-utils
-    , pre-commit
-    , ...
-    }@inputs:
+  outputs = { self, flake-utils, pre-commit, ... }@inputs:
     let
       # this is a "functor" that takes an option name
       # this allows for creating identical modules
@@ -55,10 +50,7 @@
       mkPrimaryUserModule = import ./modules/mk-primary-user-module.nix;
 
       inherit (inputs.darwin.lib) darwinSystem;
-      inherit (inputs.nixpkgs.lib)
-        attrValues
-        makeOverridable
-        optionalAttrs;
+      inherit (inputs.nixpkgs.lib) attrValues makeOverridable optionalAttrs;
 
       # Configuration for `nixpkgs`
       nixpkgsConfig = {
@@ -81,94 +73,84 @@
       };
 
       # helper for defining nix-darwin systems
-      mkDarwinSystem =
-        { modules ? [ ]
-        , homeModules ? [ ]
-        , ...
-        }@args: import ./lib/mkDarwinSystem.nix self inputs nixpkgsConfig (args // {
+      mkDarwinSystem = { modules ? [ ], homeModules ? [ ], ... }@args:
+        import ./lib/mkDarwinSystem.nix self inputs nixpkgsConfig (args // {
           inherit homeStateVersion;
           modules = attrValues self.darwinModules ++ modules;
           homeModules = attrValues self.homeManagerModules ++ homeModules;
         });
-    in
-    {
+    in {
       # `nix-darwin` configs
-      darwinConfigurations =
-        let
-          bootstrap-x86 = makeOverridable darwinSystem {
-            system = "x86_64-darwin";
-            modules = [ ./darwin/bootstrap.nix { nixpkgs = nixpkgsConfig; } ];
-          };
-        in
-        {
-          # Mininal configurations to bootstrap systems
-          inherit bootstrap-x86;
-          bootstrap-arm = bootstrap-x86.override { system = "aarch64-darwin"; };
-
-          # M1 MBP
-          matbook = mkDarwinSystem {
-            primaryUser = primaryUserInfo;
-            modules = [{
-              networking.computerName = "matbook pro m1";
-              networking.hostName = "matbook";
-              networking.knownNetworkServices = [
-                "Wi-Fi"
-              ];
-              nix.settings.cores = 2;
-              nix.settings.max-jobs = 4;
-
-              homebrew.casks = [
-                # games
-                "gog-galaxy"
-                "origin"
-                "sony-ps-remote-play"
-                "steam"
-              ];
-              home-manager.sharedModules = [{
-                # programs.fish.shellAliases = {
-                #   code = "${pkgs.vscodium}/bin/codium";
-                # };
-                programs.ssh.matchBlocks.remarkable = {
-                  hostname = "10.11.99.1";
-                  user = "root";
-                  port = 22;
-                };
-                # programs.vscode.package = pkgs.vscodium;
-                programs.vscode.enable = true;
-              }];
-            }];
-          };
-
-          yelpbook-m1 = mkDarwinSystem {
-            primaryUser = workUserInfo;
-            modules = [
-              ({ pkgs, lib, ... }: {
-                users.primaryUser = workUserInfo;
-                networking.knownNetworkServices = [
-                  "Wi-Fi"
-                ];
-                nix.settings.cores = 2;
-                nix.settings.max-jobs = 5;
-
-                homebrew.casks = [ "itsycal" ];
-                home-manager.sharedModules = [{
-                  # TODO: how to remove this entirely?
-                  home.file.".tarsnaprc" = lib.mkForce { text = ""; };
-                  home.packages = [ pkgs.yubiswitch ];
-                  programs.ssh.matchBlocks.devbox = {
-                    hostname = "csdev6";
-                    forwardAgent = true;
-                    serverAliveInterval = 120;
-                  };
-                  programs.fish.functions.devbox.body = ''
-                    ssh -t devbox "agenttmux attach; or agenttmux new -s yelp"
-                  '';
-                  launchd.agents.tarsnap.enable = lib.mkForce false;
-                }];
-              })
-            ];
-          };
+      darwinConfigurations = let
+        bootstrap-x86 = makeOverridable darwinSystem {
+          system = "x86_64-darwin";
+          modules = [ ./darwin/bootstrap.nix { nixpkgs = nixpkgsConfig; } ];
         };
+      in {
+        # Mininal configurations to bootstrap systems
+        inherit bootstrap-x86;
+        bootstrap-arm = bootstrap-x86.override { system = "aarch64-darwin"; };
+
+        # M1 MBP
+        matbook = mkDarwinSystem {
+          primaryUser = primaryUserInfo;
+          modules = [{
+            networking.computerName = "matbook pro m1";
+            networking.hostName = "matbook";
+            networking.knownNetworkServices = [ "Wi-Fi" ];
+            nix.settings.cores = 2;
+            nix.settings.max-jobs = 4;
+
+            homebrew.casks = [
+              # games
+              "gog-galaxy"
+              "origin"
+              "sony-ps-remote-play"
+              "steam"
+            ];
+            home-manager.sharedModules = [{
+              # programs.fish.shellAliases = {
+              #   code = "${pkgs.vscodium}/bin/codium";
+              # };
+              programs.ssh.matchBlocks.remarkable = {
+                hostname = "10.11.99.1";
+                user = "root";
+                port = 22;
+              };
+              # programs.vscode.package = pkgs.vscodium;
+              programs.vscode.enable = true;
+            }];
+          }];
+        };
+
+        yelpbook-m1 = mkDarwinSystem {
+          primaryUser = workUserInfo;
+          modules = [
+            ({ pkgs, lib, ... }: {
+              users.primaryUser = workUserInfo;
+              networking.knownNetworkServices = [ "Wi-Fi" ];
+              nix.settings.cores = 2;
+              nix.settings.max-jobs = 5;
+
+              homebrew.casks = [ "itsycal" ];
+              home-manager.sharedModules = [{
+                # TODO: how to remove this entirely?
+                home.file.".tarsnaprc" = lib.mkForce { text = ""; };
+                home.packages = [ pkgs.yubiswitch ];
+                programs.ssh.matchBlocks.devbox = {
+                  hostname = "csdev6";
+                  forwardAgent = true;
+                  serverAliveInterval = 120;
+                };
+                programs.fish.functions.devbox.body = ''
+                  ssh -t devbox "agenttmux attach; or agenttmux new -s yelp"
+                '';
+                launchd.agents.tarsnap.enable = lib.mkForce false;
+              }];
+            })
+          ];
+        };
+      };
 
       # Overlays --------------------------------------------------------------- {{{
 
@@ -198,17 +180,21 @@
         colors = import ./overlays/colors.nix;
 
         # Overlay useful on Macs with Apple Silicon
-        apple-silicon = _: prev: optionalAttrs (prev.stdenv.system == "aarch64-darwin") {
-          # Add access to x86 packages system is running Apple Silicon
-          pkgs-x86 = import inputs.nixpkgs {
-            system = "x86_64-darwin";
-            inherit (nixpkgsConfig) config;
+        apple-silicon = _: prev:
+          optionalAttrs (prev.stdenv.system == "aarch64-darwin") {
+            # Add access to x86 packages system is running Apple Silicon
+            pkgs-x86 = import inputs.nixpkgs {
+              system = "x86_64-darwin";
+              inherit (nixpkgsConfig) config;
+            };
           };
-        };
 
-        homebrew-enabled = _: prev: optionalAttrs prev.stdenv.isDarwin {
-          lib = prev.lib // { homebrew-enabled = inputs.homebrew-enabled.value; };
-        };
+        homebrew-enabled = _: prev:
+          optionalAttrs prev.stdenv.isDarwin {
+            lib = prev.lib // {
+              homebrew-enabled = inputs.homebrew-enabled.value;
+            };
+          };
 
         extra-pkgs = import ./pkgs { inherit inputs; };
       };
@@ -239,7 +225,8 @@
         starship = import ./home/starship.nix;
         starship-symbols = import ./home/starship-symbols.nix;
         # modules
-        programs-kakoune-extras = import ./modules/home/programs/kakoune/extras.nix; # currently unused
+        programs-kakoune-extras =
+          import ./modules/home/programs/kakoune/extras.nix; # currently unused
         programs-helix-extras = import ./modules/home/programs/helix/extras.nix;
         programs-kitty-extras = import ./modules/home/programs/kitty/extras.nix;
         home-primary-user = mkPrimaryUserModule "home";
@@ -247,18 +234,21 @@
 
       templates = import ./templates;
     } // flake-utils.lib.eachDefaultSystem (system: {
-      legacyPackages = import inputs.nixpkgs (nixpkgsConfig // { inherit system; });
+      legacyPackages =
+        import inputs.nixpkgs (nixpkgsConfig // { inherit system; });
 
       checks.pre-commit = pre-commit.lib.${system}.run {
         src = ./.;
         hooks = {
           deadnix.enable = true;
-          nixpkgs-fmt.enable = true;
+          nil.enable = true;
+          nixfmt.enable = true;
           statix.enable = true;
         };
       };
 
-      devShells = let pkgs = self.legacyPackages.${system}; in {
+      devShells = let pkgs = self.legacyPackages.${system};
+      in {
         default = pkgs.mkShell {
           inherit (self.checks.${system}.pre-commit) shellHook;
         };
diff --git a/home/files.nix b/home/files.nix
index ef7551b..6952a36 100644
--- a/home/files.nix
+++ b/home/files.nix
@@ -1,9 +1,7 @@
 { config, ... }: {
   # Misc configuration files --------------------------------------------------------------------{{{
 
-  xdg = {
-    enable = true;
-  };
+  xdg = { enable = true; };
 
   home.file = {
     ".pijulconfig".text = ''
diff --git a/home/fish.nix b/home/fish.nix
index aa1a93e..a95d9c0 100644
--- a/home/fish.nix
+++ b/home/fish.nix
@@ -7,10 +7,7 @@
 
   # Add Fish plugins
   home.packages = builtins.attrValues {
-    inherit (pkgs.fishPlugins)
-      autopair-fish
-      colored-man-pages
-      done;
+    inherit (pkgs.fishPlugins) autopair-fish colored-man-pages done;
   };
   programs.fish.plugins = [ pkgs.fishPlugins.fisher ];
 
@@ -136,10 +133,8 @@
 
   # Aliases
   programs.fish.shellAliases =
-    let
-      inherit (config.home.primaryUser) nixConfigDirectory;
-    in
-    {
+    let inherit (config.home.primaryUser) nixConfigDirectory;
+    in {
       # Nix related
       from-nix = "from-dir ${nixConfigDirectory}";
       # darwin-rebuild build 
@@ -147,7 +142,8 @@
       # darwin-rebuild switch full
       drsf = "from-nix darwin-rebuild switch --flake .";
       # darwin-rebuild switch (no homebrew)
-      drs = "from-nix darwin-rebuild switch --flake . --override-input homebrew-enabled github:boolean-option/false";
+      drs =
+        "from-nix darwin-rebuild switch --flake . --override-input homebrew-enabled github:boolean-option/false";
       # edit darwin-rebuild config in code/codium
       drc = "code ${nixConfigDirectory}";
       # edit darwin-rebuild config in vim
@@ -164,7 +160,8 @@
       nsh = "nix shell";
       nshu = "nix-unfree shell";
       nrp = "nix repl --expr '{ pkgs = (import <nixpkgs> { }); }'";
-      nrpu = "nix repl --expr '{ pkgs = (import <nixpkgs> { config.allowUnfree = true; }); }' --impure";
+      nrpu =
+        "nix repl --expr '{ pkgs = (import <nixpkgs> { config.allowUnfree = true; }); }' --impure";
 
       # Other
       ".." = "cd ..";
@@ -183,7 +180,8 @@
       colortest = "${pkgs.terminal-colors}/bin/terminal-colors -o";
     } // lib.optionalAttrs pkgs.stdenv.isDarwin {
       sb = "set-background-to-macOS";
-      conda-init = "eval /opt/homebrew/bin/conda 'shell.fish' 'hook' $argv | source";
+      conda-init =
+        "eval /opt/homebrew/bin/conda 'shell.fish' 'hook' $argv | source";
     };
 
   # Configuration that should be above `loginShellInit` and `interactiveShellInit`.
diff --git a/home/git.nix b/home/git.nix
index 428581e..482d074 100644
--- a/home/git.nix
+++ b/home/git.nix
@@ -17,10 +17,7 @@
     help.autocorrect = "prompt";
   };
 
-  programs.git.ignores = [
-    ".DS_Store"
-    ".direnv"
-  ];
+  programs.git.ignores = [ ".DS_Store" ".direnv" ];
 
   # Enhanced diffs
   programs.git.delta.enable = true;
diff --git a/home/helix.nix b/home/helix.nix
index b76f480..992de1c 100644
--- a/home/helix.nix
+++ b/home/helix.nix
@@ -31,7 +31,5 @@
     dark = "rose_pine";
   };
 
-  home.sessionVariables = {
-    EDITOR = "hx";
-  };
+  home.sessionVariables = { EDITOR = "hx"; };
 }
diff --git a/home/kitty.nix b/home/kitty.nix
index 2bb5dce..69a99e7 100644
--- a/home/kitty.nix
+++ b/home/kitty.nix
@@ -1,41 +1,34 @@
 { pkgs, ... }:
 # Let-In --------------------------------------------------------------------------------------- {{{
 let
-  colorsToKitty = colors: with colors; {
-    inherit
-      background
-      foreground
-      selection_background
-      selection_foreground
-      tab_bar_background
-      active_tab_background
-      active_tab_foreground
-      inactive_tab_background
-      inactive_tab_foreground;
-    cursor = white;
-    cursor_text_color = background;
-    color0 = black;
-    color8 = black;
-    color1 = red;
-    color9 = red;
-    color2 = green;
-    color10 = lime;
-    color3 = yellow;
-    color11 = orange;
-    color4 = blue;
-    color12 = blue;
-    color5 = magenta;
-    color13 = magenta;
-    color6 = cyan;
-    color14 = cyan;
-    color7 = white;
-    color15 = white;
-    url_color = brightgreen;
-  };
+  colorsToKitty = colors:
+    with colors; {
+      inherit background foreground selection_background selection_foreground
+        tab_bar_background active_tab_background active_tab_foreground
+        inactive_tab_background inactive_tab_foreground;
+      cursor = white;
+      cursor_text_color = background;
+      color0 = black;
+      color8 = black;
+      color1 = red;
+      color9 = red;
+      color2 = green;
+      color10 = lime;
+      color3 = yellow;
+      color11 = orange;
+      color4 = blue;
+      color12 = blue;
+      color5 = magenta;
+      color13 = magenta;
+      color6 = cyan;
+      color14 = cyan;
+      color7 = white;
+      color15 = white;
+      url_color = brightgreen;
+    };
   font = "Rec Mono Duotone";
-in
-# }}}
-{
+  # }}}
+in {
   # Kitty terminal
   # https://sw.kovidgoyal.net/kitty/conf.html
   # https://rycee.gitlab.io/home-manager/options.html#opt-programs.kitty.enable
diff --git a/home/programs.nix b/home/programs.nix
index 97c6e79..fa534e5 100644
--- a/home/programs.nix
+++ b/home/programs.nix
@@ -5,9 +5,7 @@
     # https://rycee.gitlab.io/home-manager/options.html#opt-programs.bat.enable
     bat = {
       enable = true;
-      config = {
-        style = "auto";
-      };
+      config = { style = "auto"; };
     };
     # Direnv, load and unload environment variables depending on the current directory.
     # https://direnv.net
@@ -16,12 +14,8 @@
       enable = true;
       nix-direnv.enable = true;
     };
-    nix-index = {
-      enable = true;
-    };
-    nushell = {
-      enable = true;
-    };
+    nix-index = { enable = true; };
+    nushell = { enable = true; };
     ssh = {
       enable = true;
       matchBlocks."*".extraOptions = lib.optionalAttrs pkgs.stdenv.isDarwin {
@@ -31,11 +25,9 @@
     };
     # vscode = {
     #   enable = true;
-    # extensions = [ pijul-vscode ];
+    #   extensions = [ pijul-vscode ];
     # };
-    zoxide = {
-      enable = true;
-    };
+    zoxide = { enable = true; };
   };
   # }}}
 
@@ -43,22 +35,17 @@
 
   home.packages = builtins.attrValues ({
     inherit (pkgs)
-      # GUI apps
-      cinny
-      discord-ptb
-      lagrange
-      obsidian
-      slack
-      zoom-us
+    # GUI apps
+      cinny discord-ptb lagrange obsidian slack zoom-us
 
       # System
+      curl wget
       # lightweight session management
       abduco
       # archive tool
       atool
       # fancy version of `top` with ASCII graphs
       bottom
-      curl
       # fancy version of `du`
       du-dust
       # fancy version of `ls`
@@ -79,7 +66,6 @@
       thefuck
       # extract RAR archives
       unrar
-      wget
       # extract XZ archives
       xz
 
@@ -106,23 +92,19 @@
       xh
 
       # Useful nix related tools
+      nixfmt nix-prefetch-git nix-tree
       # adding/managing alternative binary caches hosted by Cachix
       cachix
       # run software from nixpkgs without installing it
       comma
-      nixpkgs-fmt
-      nix-prefetch-git
-      nix-tree
       # nix language server
-      nil
-      ;
+      nil;
   } // lib.optionalAttrs pkgs.stdenv.isDarwin {
     inherit (pkgs)
-      # useful macOS CLI commands
+    # useful macOS CLI commands
       m-cli
       # see /overlays/colors.nix
-      is-dark-mode
-      ;
+      is-dark-mode;
   });
   # }}}
 }
diff --git a/home/services/dark-mode-notify.nix b/home/services/dark-mode-notify.nix
index 4c453c9..dba322d 100644
--- a/home/services/dark-mode-notify.nix
+++ b/home/services/dark-mode-notify.nix
@@ -2,8 +2,8 @@
   # dark-mode-notify configuration
   # {{{
   launchd.agents.dark-mode-notify =
-    let logPath = "${config.xdg.stateHome}/dark-mode-notify"; in
-    {
+    let logPath = "${config.xdg.stateHome}/dark-mode-notify";
+    in {
       enable = true;
       config = {
         Label = "ke.bou.dark-mode-notify";
diff --git a/home/services/tarsnap.nix b/home/services/tarsnap.nix
index d7bdc0b..a7ca27b 100644
--- a/home/services/tarsnap.nix
+++ b/home/services/tarsnap.nix
@@ -1,48 +1,43 @@
 { config, pkgs, ... }: {
   # tarsnap periodic backup configuration
   # {{{
-  launchd.agents.tarsnap =
-    let
-      logPath = "${config.xdg.stateHome}/tarsnap";
-      tarsnapBackup = pkgs.writeShellScriptBin "tarsnap-backup-helper" ''
-        date=$(date -u +%Y-%m-%dT%H:%M:%SZ)
-        echo
-        echo "Running tarsnap backup for $date"
-        /opt/homebrew/bin/tarsnap -c \
-          --configfile ${config.home.homeDirectory}/.tarsnaprc \
-          --keyfile ${config.xdg.configHome}/tarsnap/write-only.key \
-          -f $(uname -n)-$date \
-          ${config.home.homeDirectory}/{dotfiles.nix,Desktop,Development,Documents,Downloads}
-      '';
-    in
-    {
-      enable = true;
-      config = {
-        Label = "com.tarsnap.tarsnap";
-        StandardErrorPath = "${logPath}/error.log";
-        StandardOutPath = "${logPath}/out.log";
-        StartCalendarInterval = [
-          {
-            # every sunday
-            Weekday = 0;
-            # at midnight
-            Hour = 0;
-            Minute = 0;
-          }
-          {
-            # every wednesday
-            Weekday = 3;
-            # at noon
-            Hour = 12;
-            Minute = 0;
-          }
-        ];
-        Program = "${tarsnapBackup}/bin/tarsnap-backup-helper";
-      };
+  launchd.agents.tarsnap = let
+    logPath = "${config.xdg.stateHome}/tarsnap";
+    tarsnapBackup = pkgs.writeShellScriptBin "tarsnap-backup-helper" ''
+      date=$(date -u +%Y-%m-%dT%H:%M:%SZ)
+      echo
+      echo "Running tarsnap backup for $date"
+      /opt/homebrew/bin/tarsnap -c \
+        --configfile ${config.home.homeDirectory}/.tarsnaprc \
+        --keyfile ${config.xdg.configHome}/tarsnap/write-only.key \
+        -f $(uname -n)-$date \
+        ${config.home.homeDirectory}/{dotfiles.nix,Desktop,Development,Documents,Downloads}
+    '';
+  in {
+    enable = true;
+    config = {
+      Label = "com.tarsnap.tarsnap";
+      StandardErrorPath = "${logPath}/error.log";
+      StandardOutPath = "${logPath}/out.log";
+      StartCalendarInterval = [
+        {
+          # every sunday
+          Weekday = 0;
+          # at midnight
+          Hour = 0;
+          Minute = 0;
+        }
+        {
+          # every wednesday
+          Weekday = 3;
+          # at noon
+          Hour = 12;
+          Minute = 0;
+        }
+      ];
+      Program = "${tarsnapBackup}/bin/tarsnap-backup-helper";
     };
+  };
   # }}}
 }
 
-
-
-
diff --git a/home/starship-symbols.nix b/home/starship-symbols.nix
index 3d99733..bf38f2d 100644
--- a/home/starship-symbols.nix
+++ b/home/starship-symbols.nix
@@ -1,6 +1,6 @@
 { lib, ... }:
-let inherit (lib) mkDefault; in
-{
+let inherit (lib) mkDefault;
+in {
   programs.starship.settings = {
     aws.symbol = mkDefault " ";
     battery.full_symbol = mkDefault "";
diff --git a/home/starship.nix b/home/starship.nix
index c460769..2e5647b 100644
--- a/home/starship.nix
+++ b/home/starship.nix
@@ -9,12 +9,14 @@
     # See docs here: https://starship.rs/config/
     # Symbols config configured in Flake.
 
-    battery.display = [
-      { threshold = 25; } # display battery information if charge is <= 25%
-    ];
+    battery.display = [{
+      threshold = 25;
+    } # display battery information if charge is <= 25%
+      ];
     directory.fish_style_pwd_dir_length = 1; # turn on fish directory truncation
     directory.truncation_length = 2; # number of directories not to truncate
-    memory_usage.disabled = true; # because it includes cached memory it's reported as full a lot
+    memory_usage.disabled =
+      true; # because it includes cached memory it's reported as full a lot
   };
   # }}}
 }
diff --git a/lib/mkDarwinSystem.nix b/lib/mkDarwinSystem.nix
index 6aeba54..a124224 100644
--- a/lib/mkDarwinSystem.nix
+++ b/lib/mkDarwinSystem.nix
@@ -1,8 +1,7 @@
 # taken from https://github.com/malob/nixpkgs/blob/27e04346555277687a60c0168969b3945c2b25ba/lib/mkDarwinSystem.nix
 self: inputs: nixpkgs:
 
-{ primaryUser
-, system ? "aarch64-darwin"
+{ primaryUser, system ? "aarch64-darwin"
 
   # `nix-darwin` modules to include
 , modules ? [ ]
@@ -12,20 +11,19 @@ self: inputs: nixpkgs:
 
   # Value for `home-manager`'s `home.stateVersion` option.
 , homeStateVersion
-  # `home-manager` modules to include
+# `home-manager` modules to include
 , homeModules ? [ ]
   # Additional `home-manager` modules to include, useful when reusing a configuration with
   # `lib.makeOverridable`.
-, extraHomeModules ? [ ]
-}:
+, extraHomeModules ? [ ] }:
 
 inputs.darwin.lib.darwinSystem {
   inherit system;
   modules = modules ++ extraModules ++ [
     inputs.home-manager.darwinModules.home-manager
     ({ config, ... }:
-      let cfg = config.users.primaryUser; in
-      {
+      let cfg = config.users.primaryUser;
+      in {
         users.primaryUser = primaryUser;
 
         inherit nixpkgs;
diff --git a/modules/home/programs/helix/extras.nix b/modules/home/programs/helix/extras.nix
index 3a5c61f..9641018 100644
--- a/modules/home/programs/helix/extras.nix
+++ b/modules/home/programs/helix/extras.nix
@@ -5,10 +5,10 @@ let
   inherit (cfg) extras;
   tomlFormat = pkgs.formats.toml { };
   inherit (lib) mkIf mkEnableOption mkOption types;
-in
-{
+in {
   options.programs.helix.extras = {
-    autoTheme.enable = mkEnableOption "Automatically switch helix theme with night mode";
+    autoTheme.enable =
+      mkEnableOption "Automatically switch helix theme with night mode";
 
     autoTheme.light = mkOption {
       type = types.str;
@@ -23,14 +23,17 @@ in
 
   config = mkIf (cfg.enable && extras.autoTheme.enable) {
     xdg.configFile = {
-      "helix/light.toml".source = tomlFormat.generate "helix-autotheme" (cfg.settings // { theme = extras.autoTheme.light; });
-      "helix/dark.toml".source = tomlFormat.generate "helix-autotheme" (cfg.settings // { theme = extras.autoTheme.dark; });
+      "helix/light.toml".source = tomlFormat.generate "helix-autotheme"
+        (cfg.settings // { theme = extras.autoTheme.light; });
+      "helix/dark.toml".source = tomlFormat.generate "helix-autotheme"
+        (cfg.settings // { theme = extras.autoTheme.dark; });
     };
 
     programs.fish.functions = {
       hx = {
         wraps = "hx";
-        description = "Helix invocation wrapper to automatically select the right theme";
+        description =
+          "Helix invocation wrapper to automatically select the right theme";
         body = ''
           if is-dark-mode
             command hx --config ${config.xdg.configHome}/helix/dark.toml $argv
diff --git a/modules/home/programs/kakoune/extras.nix b/modules/home/programs/kakoune/extras.nix
index f7f334d..cfcf145 100644
--- a/modules/home/programs/kakoune/extras.nix
+++ b/modules/home/programs/kakoune/extras.nix
@@ -9,24 +9,24 @@ let
   makeKakouneFace = face: name:
     let
       mkColor = name:
-        if hasPrefix "#" name
-        then "rgb:${substring 1 (-1) name}"
-        else if hasPrefix "!#" name
-        then "rgba:${substring 2 (-1) name}"
-        else name;
-      value =
-        if isList name
-        then concatStringsSep "," (map mkColor name)
-        else mkColor name;
-    in
-    "face global ${face} ${value}";
+        if hasPrefix "#" name then
+          "rgb:${substring 1 (-1) name}"
+        else if hasPrefix "!#" name then
+          "rgba:${substring 2 (-1) name}"
+        else
+          name;
+      value = if isList name then
+        concatStringsSep "," (map mkColor name)
+      else
+        mkColor name;
+    in "face global ${face} ${value}";
 
   makeKakouneColors = faces:
     concatStringsSep "\n"
-      ([ "# Generated by home-manager" ]
-        ++ mapAttrsToList makeKakouneFace faces);
+    ([ "# Generated by home-manager" ] ++ mapAttrsToList makeKakouneFace faces);
 
-  writeKakouneConfig = file: config: pkgs.writeText file (makeKakouneColors config);
+  writeKakouneConfig = file: config:
+    pkgs.writeText file (makeKakouneColors config);
 
   kakoune-colors = {
     light = writeKakouneConfig "light.kak" cfg.colors.light;
@@ -44,8 +44,7 @@ let
   kak-dark = pkgs.writeShellScriptBin "kak-dark" ''
     ${kak-background}/bin/kak-background dark
   '';
-in
-{
+in {
   options.programs.kakoune.extras = {
     colors = {
       enable = mkEnableOption "Custom kakoune color handling";
@@ -63,11 +62,8 @@ in
   };
 
   config = mkIf config.programs.kakoune.enable {
-    home.packages = mkIf cfg.colors.enable [
-      kak-light
-      kak-dark
-      kak-background
-    ];
+    home.packages =
+      mkIf cfg.colors.enable [ kak-light kak-dark kak-background ];
 
     xdg.configFile."kak/colors/light.kak".source = kakoune-colors.light;
     xdg.configFile."kak/colors/dark.kak".source = kakoune-colors.dark;
diff --git a/modules/home/programs/kitty/extras.nix b/modules/home/programs/kitty/extras.nix
index e2f5f4d..2d1e376 100644
--- a/modules/home/programs/kitty/extras.nix
+++ b/modules/home/programs/kitty/extras.nix
@@ -7,10 +7,12 @@ let
   cfg = config.programs.kitty.extras;
 
   # Create a Kitty config string from a Nix set
-  setToKittyConfig = with generators; toKeyValue { mkKeyValue = mkKeyValueDefault { } " "; };
+  setToKittyConfig = with generators;
+    toKeyValue { mkKeyValue = mkKeyValueDefault { } " "; };
 
   # Write a Nix set representing a kitty config into the Nix store
-  writeKittyConfig = fileName: config: pkgs.writeTextDir "${fileName}" (setToKittyConfig config);
+  writeKittyConfig = fileName: config:
+    pkgs.writeTextDir "${fileName}" (setToKittyConfig config);
 
   # Path in Nix store containing light and dark kitty color configs
   kitty-colors = pkgs.symlinkJoin {
@@ -36,8 +38,7 @@ let
   term-dark = pkgs.writeShellScriptBin "term-dark" ''
     ${term-background}/bin/term-background ${cfg.colors.dark-name}
   '';
-in
-{
+in {
 
   options.programs.kitty.extras = {
     colors = {
@@ -112,13 +113,13 @@ in
       appPath = mkOption {
         type = types.str;
         default = null;
-        description = ''Path to kitty.app'';
+        description = "Path to kitty.app";
       };
 
       iconPath = mkOption {
         type = types.str;
         default = null;
-        description = ''Path to kitty icns'';
+        description = "Path to kitty icns";
       };
     };
 
@@ -126,41 +127,38 @@ in
 
   config = mkIf config.programs.kitty.enable {
 
-    home.packages = mkIf cfg.colors.enable [
-      term-light
-      term-dark
-      term-background
-    ];
+    home.packages =
+      mkIf cfg.colors.enable [ term-light term-dark term-background ];
 
-    home.activation =
-      let
-        fileicon = "/opt/homebrew/bin/fileicon";
-      in
-      mkIf (pkgs.stdenv.isDarwin && cfg.fixIcon.enable) {
-        cleanupKittyIcon = lib.hm.dag.entryBetween [ "darwinApps" ] [ "writeBoundary" ] ''
+    home.activation = let fileicon = "/opt/homebrew/bin/fileicon";
+    in mkIf (pkgs.stdenv.isDarwin && cfg.fixIcon.enable) {
+      cleanupKittyIcon =
+        lib.hm.dag.entryBetween [ "darwinApps" ] [ "writeBoundary" ] ''
           if ${fileicon} test ${cfg.fixIcon.appPath};
           then
             $DRY_RUN_CMD sudo ${fileicon} rm ${cfg.fixIcon.appPath}
           fi
         '';
-        fixKittyIcon = lib.hm.dag.entryAfter [ "darwinApps" ] ''
-          $DRY_RUN_CMD sudo ${fileicon} set ${cfg.fixIcon.appPath} ${cfg.fixIcon.iconPath}
-        '';
-      };
+      fixKittyIcon = lib.hm.dag.entryAfter [ "darwinApps" ] ''
+        $DRY_RUN_CMD sudo ${fileicon} set ${cfg.fixIcon.appPath} ${cfg.fixIcon.iconPath}
+      '';
+    };
 
-    programs.kitty.settings = optionalAttrs cfg.colors.enable
-      {
-        allow_remote_control = "yes";
-        listen_on = "unix:/tmp/mykitty";
-      } // optionalAttrs (cfg.useSymbolsFromNerdFont != "") {
+    programs.kitty.settings = optionalAttrs cfg.colors.enable {
+      allow_remote_control = "yes";
+      listen_on = "unix:/tmp/mykitty";
+    } // optionalAttrs (cfg.useSymbolsFromNerdFont != "") {
 
       # https://github.com/ryanoasis/nerd-fonts/wiki/Glyph-Sets-and-Code-Points
-      symbol_map = "U+E5FA-U+E62B,U+E700-U+E7C5,U+F000-U+F2E0,U+E200-U+E2A9,U+F500-U+FD46,U+E300-U+E3EB,U+F400-U+F4A8,U+2665,U+26a1,U+F27C,U+E0A3,U+E0B4-U+E0C8,U+E0CA,U+E0CC-U+E0D2,U+E0D4,U+23FB-U+23FE,U+2B58,U+F300-U+F313,U+E000-U+E00D ${cfg.useSymbolsFromNerdFont}";
+      symbol_map =
+        "U+E5FA-U+E62B,U+E700-U+E7C5,U+F000-U+F2E0,U+E200-U+E2A9,U+F500-U+FD46,U+E300-U+E3EB,U+F400-U+F4A8,U+2665,U+26a1,U+F27C,U+E0A3,U+E0B4-U+E0C8,U+E0CA,U+E0CC-U+E0D2,U+E0D4,U+23FB-U+23FE,U+2B58,U+F300-U+F313,U+E000-U+E00D ${cfg.useSymbolsFromNerdFont}";
 
     };
 
     xdg.configFile."kitty/macos-launch-services-cmdline" =
-      mkIf (pkgs.stdenv.isDarwin && cfg.colors.enable) { text = "--listen-on unix:/tmp/mykitty"; };
+      mkIf (pkgs.stdenv.isDarwin && cfg.colors.enable) {
+        text = "--listen-on unix:/tmp/mykitty";
+      };
 
   };
 
diff --git a/modules/mk-primary-user-module.nix b/modules/mk-primary-user-module.nix
index ef60518..4172481 100644
--- a/modules/mk-primary-user-module.nix
+++ b/modules/mk-primary-user-module.nix
@@ -1,21 +1,20 @@
-optionName: { config, lib, pkgs, ... }:
+optionName:
+{ config, lib, pkgs, ... }:
 
 let
   inherit (lib) mkOption types;
   inherit (pkgs.stdenv) isDarwin;
   cfg = config.${optionName}.primaryUser;
-in
 
-{
+in {
   options.${optionName}.primaryUser = {
     username = mkOption { type = types.str; };
     fullName = mkOption { type = types.str; };
     email = mkOption { type = types.str; };
     homeDirectory = mkOption {
       type = types.str;
-      default =
-        let prefix = if isDarwin then "/Users" else "/home";
-        in "${prefix}/${cfg.username}";
+      default = let prefix = if isDarwin then "/Users" else "/home";
+      in "${prefix}/${cfg.username}";
     };
     nixConfigDirectory = mkOption {
       type = types.str;
diff --git a/overlays/colors.nix b/overlays/colors.nix
index b821097..3387fbe 100644
--- a/overlays/colors.nix
+++ b/overlays/colors.nix
@@ -1,8 +1,6 @@
 _final: prev: {
   lib = prev.lib // {
-    colors = {
-      tokyonight = import ./colors/tokyonight.nix;
-    };
+    colors = { tokyonight = import ./colors/tokyonight.nix; };
   };
   is-dark-mode = prev.writeShellScriptBin "is-dark-mode" ''
     defaults read -g AppleInterfaceStyle &>/dev/null
diff --git a/pkgs/cinny.nix b/pkgs/cinny.nix
index f249999..c33eb6c 100644
--- a/pkgs/cinny.nix
+++ b/pkgs/cinny.nix
@@ -5,7 +5,8 @@ stdenv.mkDerivation {
   pname = "cinny";
   nativeBuildInputs = [ undmg unzip ];
   src = fetchurl {
-    url = "https://github.com/cinnyapp/cinny-desktop/releases/download/v${version}/Cinny_desktop-x86_64.dmg";
+    url =
+      "https://github.com/cinnyapp/cinny-desktop/releases/download/v${version}/Cinny_desktop-x86_64.dmg";
     sha256 = "sha256-m8sYA7YjvhqGFuU1L1y7BtndHGd6MpuH+hKzPSukxD0=";
   };
 
diff --git a/pkgs/dark-mode-notify.nix b/pkgs/dark-mode-notify.nix
index dcceee5..e5a29c6 100644
--- a/pkgs/dark-mode-notify.nix
+++ b/pkgs/dark-mode-notify.nix
@@ -1,17 +1,10 @@
-{ stdenv
-, lib
-, xcodeenv
-, dark-mode-notify-src
-, sdkVersion
-, ...
-}:
+{ stdenv, lib, xcodeenv, dark-mode-notify-src, sdkVersion, ... }:
 let
   xcode = xcodeenv.composeXcodeWrapper {
     version = sdkVersion;
     xcodeBaseDir = "/Applications/Xcode.app";
   };
-in
-stdenv.mkDerivation {
+in stdenv.mkDerivation {
   name = "dark-mode-notify";
   src = dark-mode-notify-src;
   buildPhase = ''
diff --git a/pkgs/default.nix b/pkgs/default.nix
index e6d2cd1..ac8f59f 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -1,5 +1,6 @@
 { inputs }:
-_: prev: {
+_: prev:
+{
   inherit (inputs) kitty-icon kitty-themes;
   fishPlugins = prev.fishPlugins // {
     fisher = {
@@ -8,16 +9,11 @@ _: prev: {
     };
   };
   helix = inputs.helix.packages.${prev.stdenv.system}.default;
-} // builtins.mapAttrs
-  (name: extras:
-    prev.callPackage
-      (./. + "/${name}.nix")
-      ({ "${name}-src" = inputs."${name}-src"; } // extras))
-  {
+} // builtins.mapAttrs (name: extras:
+  prev.callPackage (./. + "/${name}.nix")
+  ({ "${name}-src" = inputs."${name}-src"; } // extras)) {
     cinny = { };
-    dark-mode-notify = {
-      sdkVersion = "14.*";
-    };
+    dark-mode-notify = { sdkVersion = "14.*"; };
     ia-writer-family = { };
     yubiswitch = { };
   }
diff --git a/pkgs/ia-writer-family.nix b/pkgs/ia-writer-family.nix
index 37a32c4..c0d66f2 100644
--- a/pkgs/ia-writer-family.nix
+++ b/pkgs/ia-writer-family.nix
@@ -1,9 +1,7 @@
 { ia-writer-family-src, lib, stdenv }:
 
-let
-  version = "20181224";
-in
-stdenv.mkDerivation {
+let version = "20181224";
+in stdenv.mkDerivation {
   name = "ia-writer-family-${version}";
 
   src = ia-writer-family-src;
diff --git a/pkgs/yubiswitch.nix b/pkgs/yubiswitch.nix
index 43a0061..ea62a94 100644
--- a/pkgs/yubiswitch.nix
+++ b/pkgs/yubiswitch.nix
@@ -5,7 +5,8 @@ stdenv.mkDerivation {
   pname = "yubiswitch";
   nativeBuildInputs = [ undmg unzip ];
   src = fetchurl {
-    url = "https://github.com/pallotron/yubiswitch/releases/download/v${version}/yubiswitch_${version}.dmg";
+    url =
+      "https://github.com/pallotron/yubiswitch/releases/download/v${version}/yubiswitch_${version}.dmg";
     sha256 = "aR/3AXwAAhFYchfGCmqfNSs8uNnuLOCZ8B0JbXlKAf8=";
   };
 
diff --git a/templates/default.nix b/templates/default.nix
index b3ffe82..079b674 100644
--- a/templates/default.nix
+++ b/templates/default.nix
@@ -1,7 +1,7 @@
 let
-  mkTemplates = builtins.mapAttrs (name: attrs: attrs // { path = ./. + "/${name}"; });
-in
-mkTemplates {
+  mkTemplates =
+    builtins.mapAttrs (name: attrs: attrs // { path = ./. + "/${name}"; });
+in mkTemplates {
   rust = {
     description = "A rust flake template based on flake.parts";
     welcomeText = ''
diff --git a/templates/rust/flake.nix b/templates/rust/flake.nix
index f91ac92..58012c7 100644
--- a/templates/rust/flake.nix
+++ b/templates/rust/flake.nix
@@ -13,21 +13,17 @@
   outputs = inputs@{ self, flake-parts, crane, pre-commit, ... }:
     flake-parts.lib.mkFlake { inherit inputs; } {
       imports = [ pre-commit.flakeModule ];
-      systems = [
-        "aarch64-darwin"
-        "aarch64-linux"
-        "x86_64-darwin"
-        "x86_64-linux"
-      ];
+      systems =
+        [ "aarch64-darwin" "aarch64-linux" "x86_64-darwin" "x86_64-linux" ];
       perSystem = { config, pkgs, system, ... }:
         let
           crane-lib = crane.lib.${system};
           package = crane-lib.buildPackage {
             src = crane-lib.cleanCargoSource ./.;
-            nativeBuildInputs = pkgs.lib.optionals pkgs.stdenv.isDarwin [ pkgs.libiconv ];
+            nativeBuildInputs =
+              pkgs.lib.optionals pkgs.stdenv.isDarwin [ pkgs.libiconv ];
           };
-        in
-        {
+        in {
           pre-commit.settings.hooks = {
             rustfmt.enable = true;
             clippy.enable = true;
@@ -42,19 +38,12 @@
             '';
             inputsFrom = builtins.attrValues self.checks;
 
-            RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
-            nativeBuildInputs = builtins.attrValues {
-              inherit (pkgs)
-                cargo
-                rustc
-                ;
-            };
+            RUST_SRC_PATH =
+              "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
+            nativeBuildInputs =
+              builtins.attrValues { inherit (pkgs) cargo rustc; };
             buildInputs = builtins.attrValues {
-              inherit (pkgs)
-                rust-analyzer
-                rustfmt
-                clippy
-                ;
+              inherit (pkgs) rust-analyzer rustfmt clippy;
             };
           };
         };