diff --git a/flake.nix b/flake.nix
index 0705297..8f8659c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -78,25 +78,24 @@
     let
       inherit (self) outputs;
       util = import ./util { inherit inputs outputs; };
-    in
-    with util; rec {
+    in rec {
       # Packages (`nix build`)
-      packages = forEachPkgs (pkgs:
+      packages = util.forEachPkgs (pkgs:
         import ./pkgs { inherit pkgs; }
       );
 
       # Apps (`nix run`)
-      apps = forEachPkgs (pkgs:
+      apps = util.forEachPkgs (pkgs:
         import ./apps { inherit pkgs; }
       );
 
       # Dev Shells (`nix develop`)
-      devShells = forEachPkgs (pkgs:
+      devShells = util.forEachPkgs (pkgs:
         import ./shells { inherit pkgs; }
       );
 
       # Formatter
-      formatter = forEachPkgs (pkgs:
+      formatter = util.forEachPkgs (pkgs:
         pkgs.nixpkgs-fmt
       );
 
@@ -107,22 +106,24 @@
       overlays = import ./overlays { inherit inputs outputs; };
 
       # Machines
-      inherit machines;
-      inherit homeManagerMachines;
-      inherit nixDarwinMachines;
-      inherit nixOnDroidMachines;
-      inherit nixosMachines;
+      inherit (util)
+        machines
+        homeManagerMachines
+        nixDarwinMachines
+        nixOnDroidMachines
+        nixosMachines;
 
       # Modules
-      inherit nixosModules;
-      inherit nixOnDroidModules;
-      inherit nixDarwinModules;
-      inherit homeManagerModules;
+      inherit (util)
+        nixosModules
+        nixOnDroidModules
+        nixDarwinModules
+        homeManagerModules;
 
       # Configurations
-      nixosConfigurations = autoNixosConfigurations;
-      nixOnDroidConfigurations = autoNixOnDroidConfigurations;
-      darwinConfigurations = autoDarwinConfigurations;
-      homeConfigurations = autoHomeConfigurations;
+      nixosConfigurations = util.autoNixosConfigurations;
+      nixOnDroidConfigurations = util.autoNixOnDroidConfigurations;
+      darwinConfigurations = util.autoDarwinConfigurations;
+      homeConfigurations = util.autoHomeConfigurations;
     };
 }
diff --git a/util/default.nix b/util/default.nix
index c13b4a1..bc5604f 100644
--- a/util/default.nix
+++ b/util/default.nix
@@ -20,7 +20,7 @@ rec {
   # NOTE: Implying `attrs` is the output of `recurseDir`
   hasFiles = files: attrs:
     builtins.all
-      (b: b)
+      lib.id
       (builtins.map
         (file:
           builtins.hasAttr file attrs &&
@@ -30,13 +30,15 @@ rec {
   # NOTE: Implying `attrs` is the output of `recurseDir`
   hasDirectories = directories: attrs:
     builtins.all
-      (b: b)
+      lib.id
       (builtins.map
         (directory:
           builtins.hasAttr directory attrs &&
-          builtins.getAttr directory attrs == "set")
+          lib.isAttrs (builtins.getAttr directory attrs))
         directories);
 
+  and = lib.all lib.id;
+
   # pkgs helpers
   forEachSystem = lib.genAttrs [
     "aarch64-linux"
@@ -159,28 +161,35 @@ rec {
   createConfigurations =
     pred: mkHost: machines:
     lib.foldAttrs
-      (acc: x: acc)
+      lib.const
       [ ]
       (builtins.attrValues
         (builtins.mapAttrs
           (system: hosts:
-          lib.attrsets.filterAttrs
-            (host: config: config != null)
-            (builtins.mapAttrs
+            lib.attrsets.filterAttrs
               (host: config:
-              if (pred system host config)
-              then mkHost system host config
-              else null)
-              hosts))
+                config != null)
+              (builtins.mapAttrs
+                (host: config:
+                  if (pred system host config)
+                  then mkHost system host config
+                  else null)
+                hosts))
           machines));
 
   # Configurations
   autoNixosConfigurations =
     createConfigurations
       (system: host: config:
-        hasFiles
-          [ "configuration.nix" ]
-          config)
+        and
+          [
+            (hasFiles
+              [ "configuration.nix" ]
+              config)
+            (hasDirectories
+              [ "home" ]
+              config)
+          ])
       (system: host: config:
         mkNixosHost
           ../machines/nixos/${system}/${host}
@@ -194,9 +203,12 @@ rec {
   autoNixOnDroidConfigurations =
     createConfigurations
       (system: host: config:
-        hasFiles
-          [ "configuration.nix" "home.nix" ]
-          config)
+        and
+          [
+            (hasFiles
+              [ "configuration.nix" "home.nix" ]
+              config)
+          ])
       (system: host: config:
         mkNixOnDroidHost
           ../machines/nix-on-droid/${system}/${host}
@@ -207,9 +219,15 @@ rec {
   autoDarwinConfigurations =
     createConfigurations
       (system: host: config:
-        hasFiles
-          [ "configuration.nix" ]
-          config)
+        and
+          [
+            (hasFiles
+              [ "configuration.nix" ]
+              config)
+            (hasDirectories
+              [ "home" ]
+              config)
+          ])
       (system: host: config:
         mkNixDarwinHost
           ../machines/nix-darwin/${system}/${host}
@@ -223,9 +241,12 @@ rec {
   autoHomeConfigurations =
     createConfigurations
       (system: host: config:
-        hasFiles
-          [ "home.nix" ]
-          config)
+        and
+          [
+            (hasFiles
+              [ "home.nix" ]
+              config)
+          ])
       (system: host: config:
         mkHomeManagerHost
           ../machines/home-manager/${system}/${host}