diff --git a/flake.nix b/flake.nix
index ba833fc..ab7e38d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -16,31 +16,48 @@
     emacs-larstvei.url = "github:larstvei/emacs-flake";
   };
 
-  outputs = { self, nixpkgs, darwin, home-manager, emacs-larstvei, ... }@inputs: {
-    darwinConfigurations."larstvei-macbookpro" = darwin.lib.darwinSystem {
-      system = "aarch64-darwin";
+  outputs =
+    {
+      self,
+      nixpkgs,
+      darwin,
+      home-manager,
+      emacs-larstvei,
+      ...
+    }@inputs:
+    {
+      darwinConfigurations."larstvei-macbookpro" = darwin.lib.darwinSystem {
+        system = "aarch64-darwin";
 
-      modules = [
-        ./modules/core.nix
-        ./modules/macos.nix
+        modules = [
+          ./modules/core.nix
+          ./modules/macos.nix
 
-        home-manager.darwinModule
-        {
-          home-manager = {
-            useGlobalPkgs = true;
-            useUserPackages = true;
-            users.larstvei = {
-              imports = [
-                { _module.args = inputs; } # <- one could ask, why?
-                ./modules/home.nix
-              ];
+          home-manager.darwinModule
+          {
+            home-manager = {
+              useGlobalPkgs = true;
+              useUserPackages = true;
+              users.larstvei = {
+                imports = [
+                  { _module.args = inputs; } # <- one could ask, why?
+                  ./modules/home.nix
+                ];
+              };
             };
-          };
-        }
-        ({ config, pkgs, lib, ... }: {
-          services.nix-daemon.enable = true;
-        })
-      ];
+          }
+          (
+            {
+              config,
+              pkgs,
+              lib,
+              ...
+            }:
+            {
+              services.nix-daemon.enable = true;
+            }
+          )
+        ];
+      };
     };
-  };
 }
diff --git a/modules/core.nix b/modules/core.nix
index 4949fca..9280d9c 100644
--- a/modules/core.nix
+++ b/modules/core.nix
@@ -5,10 +5,19 @@
 
     settings = {
       system = "aarch64-darwin";
-      extra-platforms = [ "aarch64-darwin" "x86_64-darwin" ];
-      experimental-features = [ "nix-command" "flakes" ];
+      extra-platforms = [
+        "aarch64-darwin"
+        "x86_64-darwin"
+      ];
+      experimental-features = [
+        "nix-command"
+        "flakes"
+      ];
       build-users-group = "nixbld";
-      trusted-users = [ "root" "larstvei" ];
+      trusted-users = [
+        "root"
+        "larstvei"
+      ];
 
       substituters = [
         "https://cache.nixos.org"
@@ -24,9 +33,9 @@
     };
   };
 
-  environment.systemPackages =
-    [ pkgs.git
-      pkgs.htop
-      pkgs.tree
-    ];
+  environment.systemPackages = [
+    pkgs.git
+    pkgs.htop
+    pkgs.tree
+  ];
 }
diff --git a/modules/home.nix b/modules/home.nix
index 0c985c1..d6b4566 100644
--- a/modules/home.nix
+++ b/modules/home.nix
@@ -1,7 +1,15 @@
-{ lib, pkgs, emacs-larstvei, ... }:
+{
+  lib,
+  pkgs,
+  emacs-larstvei,
+  ...
+}:
 let
   concatAttrVals = attrSet: lib.concatMap (x: x) (lib.attrValues attrSet);
-  tools = import ./tools.nix { inherit pkgs; inherit emacs-larstvei; };
+  tools = import ./tools.nix {
+    inherit pkgs;
+    inherit emacs-larstvei;
+  };
   langauges = import ./languages.nix { inherit pkgs; };
 in
 {
@@ -54,7 +62,11 @@ in
       enable = true;
       userName = "larstvei";
       userEmail = "larstvei@ifi.uio.no";
-      ignores = [ ".envrc" ".DS_Store" ".direnv" ];
+      ignores = [
+        ".envrc"
+        ".DS_Store"
+        ".direnv"
+      ];
     };
 
     direnv = {
diff --git a/modules/languages.nix b/modules/languages.nix
index 59c5089..7f001ff 100644
--- a/modules/languages.nix
+++ b/modules/languages.nix
@@ -1,5 +1,6 @@
 { pkgs, ... }:
-with pkgs; {
+with pkgs;
+{
   bqn = [
     cbqn
   ];
@@ -18,10 +19,11 @@ with pkgs; {
   ];
 
   haskell = [
-    (haskell.packages.ghc96.ghcWithPackages
-      (ps: with ps; [
+    (haskell.packages.ghc96.ghcWithPackages (
+      ps: with ps; [
         QuickCheck
-      ]))
+      ]
+    ))
     stack
   ];
 
@@ -40,12 +42,12 @@ with pkgs; {
 
   nix = [
     nil
-    nixfmt
+    nixfmt-rfc-style
   ];
 
   python = [
-    (python3.withPackages
-      (python-packages: with python-packages; [
+    (python3.withPackages (
+      python-packages: with python-packages; [
         graphviz
         html2text
         hypothesis
@@ -60,7 +62,8 @@ with pkgs; {
         xlsxwriter
         yattag
         z3
-      ]))
+      ]
+    ))
   ];
 
   tex = [
diff --git a/modules/macos.nix b/modules/macos.nix
index e95af7a..13bf14b 100644
--- a/modules/macos.nix
+++ b/modules/macos.nix
@@ -1,4 +1,5 @@
-{ pkgs, lib, ... }: {
+{ pkgs, lib, ... }:
+{
 
   fonts.packages = with pkgs; [
     fira
@@ -30,7 +31,9 @@
       remapCapsLockToControl = true;
     };
     defaults = {
-      screencapture = { location = "/tmp"; };
+      screencapture = {
+        location = "/tmp";
+      };
       dock = {
         autohide = true;
         showhidden = true;
@@ -62,7 +65,10 @@
       upgrade = true;
       cleanup = "uninstall";
     };
-    taps = [ "homebrew/cask" "homebrew/cask-versions" ];
+    taps = [
+      "homebrew/cask"
+      "homebrew/cask-versions"
+    ];
     casks = [
       "amethyst"
       "arc"
diff --git a/modules/tools.nix b/modules/tools.nix
index f5cbc99..197e6a1 100644
--- a/modules/tools.nix
+++ b/modules/tools.nix
@@ -1,5 +1,6 @@
 { pkgs, emacs-larstvei, ... }:
-with pkgs; {
+with pkgs;
+{
 
   editor = [
     emacs-larstvei.defaultPackage.${pkgs.system}