diff --git a/default.nix b/default.nix
index af5ac49c..ca28016d 100644
--- a/default.nix
+++ b/default.nix
@@ -18,7 +18,7 @@ let
   filterAttrNamesToList = filter: set:
     lib.foldl' (a: b: a ++ b) [ ]
       (map (e: if (filter e set.${e}) then [ e ] else [ ]) (lib.attrNames set));
-  depotNames = lib.unique ((filterAttrNamesToList (name: type: name != "trusted" && type == "directory") (builtins.readDir ./depot)) ++ (filterAttrNamesToList (name: type: name != "pkgs" && type == "directory") (builtins.readDir ./depot/trusted)));
+  depotNames = lib.unique ((lib.folderList ./depot ["trusted"]) ++ (lib.folderList ./depot/trusted ["pkgs"]));
   depot = lib.mapListToAttrs (folder: lib.nameValuePair folder (lib.domainMerge { inherit folder; })) depotNames;
 
   /*
diff --git a/depot/users/kat/default.nix b/depot/users/kat/default.nix
index dff6c79b..7a2c9a6b 100644
--- a/depot/users/kat/default.nix
+++ b/depot/users/kat/default.nix
@@ -9,10 +9,7 @@ let katUser = { lib }: let
       (./. + "/${profile}")
     ];
   };
-}; filterAttrNamesToList = filter: set:
-    lib.foldl' (a: b: a ++ b) [ ]
-      (map (e: if (filter e set.${e}) then [ e ] else [ ]) (lib.attrNames set));
-profileNames = (filterAttrNamesToList (name: type: name != "base" && type == "directory") (builtins.readDir ./.));
+}; profileNames = lib.folderList ./. ["base"];
 userProfiles = with userProfiles;
   lib.genAttrs profileNames userImport // {
   base = { imports = [ ./nixos.nix (userImport "base") trustedImport ]; };
diff --git a/pkgs/lib/default.nix b/pkgs/lib/default.nix
index e1342adc..c05625f2 100644
--- a/pkgs/lib/default.nix
+++ b/pkgs/lib/default.nix
@@ -15,4 +15,5 @@
   domainMerge = import ./domain-merge.nix { inherit lib; };
   modListMerge = import ./intersect-merge.nix { inherit lib; };
   modList = import ./module-list.nix { inherit lib; };
+  folderList = import ./folder-list.nix { inherit lib; };
 }; in katlib
diff --git a/pkgs/lib/folder-list.nix b/pkgs/lib/folder-list.nix
new file mode 100644
index 00000000..2c50ed6e
--- /dev/null
+++ b/pkgs/lib/folder-list.nix
@@ -0,0 +1,5 @@
+{ lib }: path: excludes: let
+filterAttrNamesToList = filter: set:
+    lib.foldl' (a: b: a ++ b) [ ]
+      (map (e: if (filter e set.${e}) then [ e ] else [ ]) (lib.attrNames set));
+in (filterAttrNamesToList (name: type: ! (builtins.elem name excludes) && type == "directory") (builtins.readDir path))