diff --git a/modules/nixos/tools/devenv/default.nix b/modules/nixos/tools/devenv/default.nix
new file mode 100644
index 0000000..1db757f
--- /dev/null
+++ b/modules/nixos/tools/devenv/default.nix
@@ -0,0 +1,23 @@
+{
+  config,
+  lib,
+  namespace,
+  pkgs,
+  ...
+}:
+let
+  inherit (lib) mkIf mkEnableOption;
+
+  cfg = config.${namespace}.tools.devenv;
+in
+{
+  options.${namespace}.tools.devenv = {
+    enable = mkEnableOption "Whether or not to enable direnv.";
+  };
+
+  config = mkIf cfg.enable {
+    environment.systemPackages = [
+      pkgs.devenv
+    ];
+  };
+}
diff --git a/systems/x86_64-linux/yggdrasil/default.nix b/systems/x86_64-linux/yggdrasil/default.nix
index def7f10..d316642 100644
--- a/systems/x86_64-linux/yggdrasil/default.nix
+++ b/systems/x86_64-linux/yggdrasil/default.nix
@@ -110,6 +110,8 @@ in
       factorio-server = disabled;
     };
 
+    tools.devenv = enabled;
+
     system = {
       hardware = {
         bluetooth = enabled;