diff --git a/docker-arm/home-manager/home.nix b/docker-arm/home-manager/home.nix
index a368e20..dc01fc5 100644
--- a/docker-arm/home-manager/home.nix
+++ b/docker-arm/home-manager/home.nix
@@ -1,14 +1,9 @@
 {
-  config,
-  lib,
-  pkgs,
+  util,
   ...
 }:
-let
-  util = import ../../util.nix { inherit config lib pkgs; };
-in
 {
-  nixpkgs = util.nixpkgs;
+  imports = [ ../../util.nix ];
 
   home = {
     # # https://nix-community.github.io/home-manager/release-notes.xhtml
@@ -17,16 +12,12 @@ in
     username = "agent-arm64";
     homeDirectory = "/home/agent-arm64";
 
-    packages = util.packages;
-
-    file = util.file // {
+    file = {
       ".codex/config.toml" = util.symlink "docker-arm/codex/config.toml";
     };
   };
 
-  programs = util.programs // {
+  programs = {
     bash.enable = true; # Necessary for aliases and Starship to work.
   };
-
-  assertions = util.assertions;
 }
diff --git a/docker-x86/home-manager/home.nix b/docker-x86/home-manager/home.nix
index 107df59..d77da1c 100644
--- a/docker-x86/home-manager/home.nix
+++ b/docker-x86/home-manager/home.nix
@@ -1,14 +1,9 @@
 {
-  config,
-  lib,
-  pkgs,
+  util,
   ...
 }:
-let
-  util = import ../../util.nix { inherit config lib pkgs; };
-in
 {
-  nixpkgs = util.nixpkgs;
+  imports = [ ../../util.nix ];
 
   home = {
     # # https://nix-community.github.io/home-manager/release-notes.xhtml
@@ -17,16 +12,12 @@ in
     username = "agent-amd64";
     homeDirectory = "/home/agent-amd64";
 
-    packages = util.packages;
-
-    file = util.file // {
+    file = {
       ".codex/config.toml" = util.symlink "docker-x86/codex/config.toml";
     };
   };
 
-  programs = util.programs // {
+  programs = {
     bash.enable = true; # Necessary for aliases and Starship to work.
   };
-
-  assertions = util.assertions;
 }
diff --git a/macos/home-manager/home.nix b/macos/home-manager/home.nix
index 51b9e6b..0f300f7 100644
--- a/macos/home-manager/home.nix
+++ b/macos/home-manager/home.nix
@@ -1,14 +1,11 @@
 {
-  config,
   lib,
   pkgs,
+  util,
   ...
 }:
-let
-  util = import ../../util.nix { inherit config lib pkgs; };
-in
 {
-  nixpkgs = util.nixpkgs;
+  imports = [ ../../util.nix ];
 
   # Enabling this causes permission issues:
   # https://github.com/nix-community/home-manager/pull/8031
@@ -21,15 +18,13 @@ in
     username = "samueles";
     homeDirectory = "/Users/samueles";
 
-    packages = util.packages;
-
     # Necessary for `git send-email` to work.
     sessionVariables = {
       NIX_SSL_CERT_FILE = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt";
       SSL_CERT_FILE = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt";
     };
 
-    file = util.file // {
+    file = {
       "Library/Application Support/Code/User/keybindings.json" =
         util.symlink "macos/vscode/keybindings.json";
       "Library/Application Support/Code/User/settings.json" = util.symlink "vscode/settings.json";
@@ -63,9 +58,7 @@ in
     };
   };
 
-  programs = util.programs // {
+  programs = {
     zsh.enable = true; # Necessary for aliases and Starship to work.
   };
-
-  assertions = util.assertions;
 }
diff --git a/nixos/home-manager/home.nix b/nixos/home-manager/home.nix
index 737351a..42ddfdf 100644
--- a/nixos/home-manager/home.nix
+++ b/nixos/home-manager/home.nix
@@ -1,14 +1,11 @@
 {
-  config,
   lib,
   pkgs,
+  util,
   ...
 }:
-let
-  util = import ../../util.nix { inherit config lib pkgs; };
-in
 {
-  nixpkgs = util.nixpkgs;
+  imports = [ ../../util.nix ];
 
   home = {
     # https://nix-community.github.io/home-manager/release-notes.xhtml
@@ -17,7 +14,7 @@ in
     username = "sam";
     homeDirectory = "/home/sam";
 
-    packages = util.packages ++ [
+    packages = [
       pkgs.discord
       pkgs.obsidian
       pkgs.prismlauncher
@@ -26,7 +23,7 @@ in
       pkgs.xsel # Used by the VS Code "Open In GitHub" extension.
     ];
 
-    file = util.file // {
+    file = {
       ".config/Code/User/keybindings.json" = util.symlink "vscode/keybindings.json";
       ".config/Code/User/settings.json" = util.symlink "vscode/settings.json";
     };
@@ -46,9 +43,7 @@ in
     };
   };
 
-  programs = util.programs // {
+  programs = {
     bash.enable = true; # Necessary for aliases and Starship to work.
   };
-
-  assertions = util.assertions;
 }
diff --git a/ubuntu/home-manager/home.nix b/ubuntu/home-manager/home.nix
index 199c4f5..687e5b2 100644
--- a/ubuntu/home-manager/home.nix
+++ b/ubuntu/home-manager/home.nix
@@ -1,14 +1,10 @@
 {
-  config,
-  lib,
   pkgs,
+  util,
   ...
 }:
-let
-  util = import ../../util.nix { inherit config lib pkgs; };
-in
 {
-  nixpkgs = util.nixpkgs;
+  imports = [ ../../util.nix ];
 
   home = {
     # # https://nix-community.github.io/home-manager/release-notes.xhtml
@@ -17,11 +13,11 @@ in
     username = "saestep";
     homeDirectory = "/home/saestep";
 
-    packages = util.packages ++ [
+    packages = [
       pkgs.xsel # Used by the VS Code "Open In GitHub" extension.
     ];
 
-    file = util.file // {
+    file = {
       ".config/Code/User/keybindings.json" = util.symlink "vscode/keybindings.json";
       ".config/Code/User/settings.json" = util.symlink "vscode/settings.json";
     };
@@ -33,9 +29,7 @@ in
     vulkan.enable = true;
   };
 
-  programs = util.programs // {
+  programs = {
     bash.enable = true; # Necessary for aliases and Starship to work.
   };
-
-  assertions = util.assertions;
 }
diff --git a/util.nix b/util.nix
index a314cea..6977e77 100644
--- a/util.nix
+++ b/util.nix
@@ -2,19 +2,23 @@
   config,
   lib,
   pkgs,
+  ...
 }:
-rec {
+let
   symlink = subpath: {
     source = config.lib.file.mkOutOfStoreSymlink "${config.home.homeDirectory}/github/samestep/env/${subpath}";
   };
+in
+{
+  _module.args.util = {
+    inherit symlink;
+  };
 
   # https://nix-community.github.io/home-manager/options.xhtml#opt-nixpkgs.config
-  nixpkgs = {
-    config.allowUnfree = true;
-  };
+  nixpkgs.config.allowUnfree = true;
 
   # https://nix-community.github.io/home-manager/options.xhtml#opt-home.packages
-  packages = [
+  home.packages = [
     pkgs.btop
     pkgs.cloc
     pkgs.gh
@@ -46,10 +50,10 @@ rec {
   ];
 
   # https://nix-community.github.io/home-manager/options.xhtml#opt-home.file
-  file = {
-    ".codex/config.toml" = symlink "codex/config.toml";
-    ".config/cloc" = symlink "cloc";
-    ".gitconfig" = symlink ".gitconfig";
+  home.file = {
+    ".codex/config.toml" = lib.mkDefault (symlink "codex/config.toml");
+    ".config/cloc" = lib.mkDefault (symlink "cloc");
+    ".gitconfig" = lib.mkDefault (symlink ".gitconfig");
   };
 
   programs = {
@@ -124,6 +128,5 @@ rec {
     };
   };
 
-  assertions = [
-  ];
+  assertions = [ ];
 }