diff --git a/flake.nix b/flake.nix
index 0e8ca23..9b6d1f0 100644
--- a/flake.nix
+++ b/flake.nix
@@ -96,11 +96,32 @@
             src = self;
             inputs = inputs // {
               self = { };
+              home-manager = {
+                lib.hm = { };
+              };
             };
           };
-          eval = builtins.tryEval (builtins.attrNames lib.snowfall);
+          standalone-home = lib.snowfall.home.create-home {
+            path = ./flake.nix;
+            name = "test@${system}";
+            inherit system;
+          };
+          standalone-special-args = standalone-home.specialArgs;
+          eval = builtins.tryEval {
+            snowfall-attrs = builtins.attrNames lib.snowfall;
+            has-standalone-home-placeholders =
+              (standalone-special-args ? osConfig)
+              && (standalone-special-args.osConfig == null)
+              && (standalone-special-args ? systemConfig)
+              && (standalone-special-args.systemConfig == null);
+            has-system-config-aliases =
+              (builtins.length (builtins.split "systemConfig = config;" (builtins.readFile ./modules/nixos/user/default.nix)) > 1)
+              && (builtins.length (builtins.split "systemConfig = config;" (builtins.readFile ./modules/darwin/user/default.nix)) > 1);
+          };
         in
         assert eval.success;
+        assert eval.value.has-standalone-home-placeholders;
+        assert eval.value.has-system-config-aliases;
         {
           snowfall-lib-eval = pkgs.runCommand "snowfall-lib-eval" { } "mkdir -p $out";
         }
diff --git a/modules/darwin/user/default.nix b/modules/darwin/user/default.nix
index cc6db64..82b41f5 100644
--- a/modules/darwin/user/default.nix
+++ b/modules/darwin/user/default.nix
@@ -69,6 +69,7 @@ in
                   type = types.submoduleWith {
                     specialArgs = {
                       osConfig = config;
+                      systemConfig = config;
                       modulesPath = "${inputs.home-manager}/modules";
                     }
                     // config.home-manager.extraSpecialArgs;
diff --git a/modules/nixos/user/default.nix b/modules/nixos/user/default.nix
index 4deaa38..02c3688 100644
--- a/modules/nixos/user/default.nix
+++ b/modules/nixos/user/default.nix
@@ -85,6 +85,7 @@ in
                   type = types.submoduleWith {
                     specialArgs = {
                       osConfig = config;
+                      systemConfig = config;
                       modulesPath = "${inputs.home-manager or "/"}/modules";
                     }
                     // (config.home-manager.extraSpecialArgs or { });
diff --git a/snowfall-lib/home/default.nix b/snowfall-lib/home/default.nix
index 601a205..94225e3 100644
--- a/snowfall-lib/home/default.nix
+++ b/snowfall-lib/home/default.nix
@@ -117,6 +117,8 @@ in
             inherit (user-metadata) user host;
 
             format = "home";
+            osConfig = specialArgs.osConfig or null;
+            systemConfig = specialArgs.systemConfig or null;
 
             inputs = snowfall-lib.flake.without-src user-inputs;
             inherit (snowfall-config) namespace;