diff --git a/flake.nix b/flake.nix
index 3d95352..fe5d6d4 100755
--- a/flake.nix
+++ b/flake.nix
@@ -42,17 +42,21 @@
       lib = inputs.nixpkgs.lib;
       gen = import ./generator.nix { inherit inputs; };
       systemsDir = ./systems;
+      isIgnoredSystemDir = name: lib.hasPrefix "_" name || lib.hasPrefix "." name;
       systemNames = lib.attrNames (lib.filterAttrs
-        (name: type: type == "directory" && builtins.pathExists (systemsDir + "/${name}/cfg.nix"))
+        (name: type:
+          type == "directory"
+          && !isIgnoredSystemDir name
+          && builtins.pathExists (systemsDir + "/${name}/cfg.nix"))
         (builtins.readDir systemsDir));
       hostsByType = systemType:
         lib.filter
           (host: (import (systemsDir + "/${host}/cfg.nix")).syscfg.type == systemType)
           systemNames;
       generateHosts = systemType:
-        builtins.listToAttrs (map
-          (host: lib.nameValuePair host (gen.generate { inherit host; }))
-          (hostsByType systemType));
+        lib.genAttrs
+          (hostsByType systemType)
+          (host: gen.generate { inherit host; });
     in {
       devShells = import ./shells { inherit inputs; };