diff --git a/setups/home-manager.nix b/setups/home-manager.nix
index 27d24080..dd55d319 100644
--- a/setups/home-manager.nix
+++ b/setups/home-manager.nix
@@ -1,6 +1,34 @@
-# This is project data for deploying home-manager users with this flake. Each
-# of the users defined here should correspond to one of the home-manager users
-# at `./users/home-manager/`.
+/*
+  This is project data for deploying home-manager users with this flake. Each
+  of the users defined here should correspond to one of the home-manager users
+  at `./users/home-manager/`.
+
+  Schema:
+
+  * systems
+      A list of host platforms to be deployed. When given no systems, it will
+      be deployed with `x86_64-linux`.
+  * modules
+      A list of home-manager modules to be included. Take note there is a
+      baseline configuration defined at `flake.nix`. You should add modules
+      very minimally here such as additional overlays, modules, and so forth.
+  * home-manager-channel
+      The home-manager branch to be used. By default, it uses the
+      `home-manager` flake input which follows the `home-manager-unstable`
+      input.
+  * nixpkgs-channel
+      The nixpkgs branch to be included. By default, it uses the `nixpkgs`
+      flake input which follows the `nixos-unstable` input.
+  * deploy
+      An attribute set of options for deploy-rs nodes.
+  * username
+      The username of the home-manager user. By default, it will use the
+      attribute name.
+  * home-directory
+      The home directory of the home-manager user. By default, it is
+      set to "/home/${username}".
+*/
+
 { lib, inputs }:
 
 {
diff --git a/setups/nixos.nix b/setups/nixos.nix
index 467f38f2..cd4e94c9 100644
--- a/setups/nixos.nix
+++ b/setups/nixos.nix
@@ -1,13 +1,39 @@
-# This is a custom data for this project where it lists the images found in
-# this flake. This can range from NixOS configurations intended to be deployed
-# for servers and desktops to installers.
-#
-# The data is then used for the image creation functions found in `flake.nix`.
-# Each of the entry should correspond to one of the hosts in `./hosts/`
-# directory.
+/*
+  This is a custom data for this project where it lists the images found in
+  this flake. This can range from NixOS configurations intended to be deployed
+  for servers and desktops to installers.
+
+  The data is then used for the image creation functions found in `flake.nix`.
+  Each of the entry should correspond to one of the hosts in `./hosts/`
+  directory.
+
+  Schema:
+
+  * systems
+      A list of systems that is expected to be deployed. This is required and
+      will have a default list of "x86_64-linux" when no system is given.
+  * format
+      The image format to be generated from nixos-generators. You can give it
+      as `null` when not intended to be listed as part of the images which is
+      often the case for desktop NixOS systems.
+  * modules
+      A list of extra NixOS modules to be passed. You'll want to see the
+      baseline host configuration defined in `flake.nix`.
+  * deploy
+      An attribute set of arguments similar to the `deploy` CLI. When this
+      attribute is present, it will be assumed as part of NixOS configurations
+      even with `format = null` which is often the case for bare metal NixOS
+      servers that also has a suitable image format for deployment.
+  * hostname
+      The hostname of the host. By default, it assumes the hostname being given
+      from the attribute name.
+  * domain
+      The domain set for the host. Normally given to server systems.
+*/
 { lib, inputs }:
 
 {
+  # The main desktop.
   ni = {
     systems = [ "x86_64-linux" ];
     format = null;
@@ -33,6 +59,7 @@
     ];
   };
 
+  # A remote server.
   plover = {
     systems = [ "x86_64-linux" ];
     format = null;
@@ -44,27 +71,35 @@
     };
   };
 
+  # TODO: Remove extra newlines that are here for whatever reason.
+  #{{{
   void = {
     systems = [ "x86_64-linux" ];
     format = "vm";
   };
+  #}}}
 
+  # The barely customized non-graphical installer.
   bootstrap = {
     systems = [ "aarch64-linux" "x86_64-linux" ];
     format = "install-iso";
     nixpkgs-channel = "nixos-unstable-small";
   };
 
+  # The barely customized graphical installer.
   graphical-installer = {
     systems = [ "aarch64-linux" "x86_64-linux" ];
     format = "install-iso";
   };
 
+  # The WSL system (that is yet to be used).
   winnowing = {
     systems = [ "x86_64-linux" ];
     format = null;
     modules = [
+      # Well, well, well...
       inputs.nixos-wsl.nixosModules.default
     ];
   };
 }
+# vim:foldmethod=marker