diff --git a/cerulean/nexus/nexus.nix b/cerulean/nexus/nexus.nix
index f3cf38a..b30647d 100644
--- a/cerulean/nexus/nexus.nix
+++ b/cerulean/nexus/nexus.nix
@@ -197,8 +197,8 @@ in {
               inherit root base;
               inherit (node) system;
               _cerulean = {
-                inherit inputs userArgs ceruleanArgs;
-                specialArgs = userArgs // ceruleanArgs;
+                inherit inputs userArgs;
+                args = ceruleanArgs;
               };
             };
             specialArgs = assert (userArgs
@@ -209,7 +209,7 @@ in {
                   `specialArgs` are like super important to Cerulean my love... </3
                   But `args.${argName}` is a reserved argument name :(
                 ''));
-              ceruleanArgs._cerulean.specialArgs;
+              userArgs // ceruleanArgs;
           in
             lib.nixosSystem {
               inherit (node) system;
diff --git a/cerulean/nixos/home-manager.nix b/cerulean/nixos/home-manager.nix
index 1d281cb..7c3d12d 100644
--- a/cerulean/nixos/home-manager.nix
+++ b/cerulean/nixos/home-manager.nix
@@ -25,21 +25,21 @@
     pathExists
     ;
 in {
-  home-manager = {
-    users =
-      config.users.users
-      |> attrNames
-      |> filter (x: pathExists (root + "/homes/${x}"))
-      |> (x:
-        lib.genAttrs x (y:
-          import (root + "/homes/${y}")));
+  config = {
+    home-manager = {
+      users =
+        config.users.users
+        |> attrNames
+        |> filter (x: pathExists (root + "/homes/${x}"))
+        |> (x: lib.genAttrs x (y: import (root + "/homes/${y}")));
 
-    extraSpecialArgs = _cerulean.specialArgs;
-    sharedModules = [
-      # user configuration
-      (import (root + "/nixpkgs.nix"))
-      # options declarations
-      (import ./nixpkgs.nix (args // {contextName = "homes";}))
-    ];
+      extraSpecialArgs = _cerulean.args;
+      sharedModules = [
+        # user configuration
+        (import (root + "/nixpkgs.nix"))
+        # options declarations
+        (import ./nixpkgs.nix (args // {contextName = "homes";}))
+      ];
+    };
   };
 }
diff --git a/cerulean/nixos/nixpkgs.nix b/cerulean/nixos/nixpkgs.nix
index b43dbbc..65db5a5 100644
--- a/cerulean/nixos/nixpkgs.nix
+++ b/cerulean/nixos/nixpkgs.nix
@@ -26,67 +26,74 @@
   cfg = config.nixpkgs.channels;
 in {
   options.nixpkgs.channels = lib.mkOption {
-    type = lib.types.attrs;
+    type = lib.types.attrsOf (lib.types.attrs);
     default = {};
-    description = "Declare package repositories";
+    description = "Declare package repositories per module context (nixos, home-manager, etc)";
     example = {
-      "pkgs" = {
-        source = "inputs.nixpkgs";
-        system = "x86-64-linux";
-        config = {
-          allowUnfree = true;
-          allowBroken = false;
+      "homes" = {
+        "pkgs" = {
+          source = "inputs.nixpkgs";
+          system = "x86-64-linux";
+          config = {
+            allowUnfree = true;
+            allowBroken = false;
+          };
         };
-      };
-      "upkgs" = {
-        source = "inputs.nixpkgs-unstable";
-        system = "x86-64-linux";
-        config = {
-          allowUnfree = false;
-          allowBroken = true;
+        "upkgs" = {
+          source = "inputs.nixpkgs-unstable";
+          system = "x86-64-linux";
+          config = {
+            allowUnfree = true;
+            allowBroken = false;
+          };
         };
       };
     };
   };
 
   config = let
+    # TODO: use lib.types.submodule to restrict what options
+    # TODO: can be given to `nixpkgs.channels.${moduleName}.${name}`
+    decl =
+      cfg.${contextName} or cfg.default;
+
     repos =
-      cfg
-      |> (xs: removeAttrs xs ["default"])
+      decl
       |> mapAttrs (
         name: args:
           lib.mkForce (
             assert args ? source
             || abort ''
-              `nixpkgs.channels.${name}` missing required attribute "source"
+              ${toString ./.}
+              `nixpkgs.channels.${contextName}.${name}` missing required attribute "source"
             '';
-              import args.source ({inherit system;} // (removeAttrs args ["source"]))
+              ((removeAttrs args ["source"])
+                // {inherit system;})
+              |> import args.source
           )
       );
-
-    # XXX: TODO: would it work to use `base` instead of having default?
-    defaultPkgs =
-      cfg.default or (throw ''
-        Your `nixpkgs.nix` file does not declare a default package source.
-        Ensure you set `nixpkgs.channels.*.default = ...;`
-      '');
   in {
     # NOTE: _module.args is a special option that allows us to
     # NOTE: set extend specialArgs from inside the modules.
     _module.args = repos;
 
-    nixpkgs =
+    nixpkgs = let
+      defaultPkgs =
+        decl.default or (throw ''
+          Your `nixpkgs.nix` file does not declare a default package source.
+          Ensure you set `nixpkgs.channels.*.default = ...;`
+        '');
+    in
       if contextName == "hosts"
-      then
-        # DEBUG: defaultPkgs
-        {
-          flake.source = lib.mkOverride 200 (defaultPkgs.source or null);
-          overlays = lib.mkOverride 200 (defaultPkgs.overlays or {});
-          config = lib.mkOverride 200 (defaultPkgs.config or {});
-        }
+      then {
+        flake.source = lib.mkOverride 200 defaultPkgs.source;
+        config = lib.mkOverride 200 defaultPkgs.config;
+      }
       else if contextName == "homes"
       then {
+        # XXX: XXX: XXX: OH OH OH OMG, its because aurora never defines pkgs
         config = lib.mkOverride 200 (defaultPkgs.config or {});
+        # XXX: WARNING: TODO: modify options so overlays must always be given as the correct type
         overlays = lib.mkOverride 200 (defaultPkgs.overlays or []);
       }
       else {};