diff --git a/lass/2configs/baseX.nix b/lass/2configs/baseX.nix
index 2b7a5c924..99e574ed4 100644
--- a/lass/2configs/baseX.nix
+++ b/lass/2configs/baseX.nix
@@ -2,6 +2,7 @@
 with import <stockholm/lib>;
 let
   user = config.krebs.build.user;
+  xmonad-lass = pkgs.callPackage <stockholm/lass/5pkgs/custom/xmonad-lass> { inherit config; };
 in {
   imports = [
     ./mpv.nix
@@ -84,7 +85,6 @@ in {
     powertop
     push
     rxvt_unicode_with-plugins
-    screengrab
     slock
     sxiv
     timewarrior
@@ -137,8 +137,8 @@ in {
     };
     serviceConfig = {
       SyslogIdentifier = "xmonad";
-      ExecStart = "${pkgs.xmonad-lass}/bin/xmonad";
-      ExecStop = "${pkgs.xmonad-lass}/bin/xmonad --shutdown";
+      ExecStart = "${xmonad-lass}/bin/xmonad";
+      ExecStop = "${xmonad-lass}/bin/xmonad --shutdown";
     };
     restartIfChanged = false;
   };
diff --git a/lass/5pkgs/xmonad-lass.nix b/lass/5pkgs/custom/xmonad-lass/default.nix
similarity index 94%
rename from lass/5pkgs/xmonad-lass.nix
rename to lass/5pkgs/custom/xmonad-lass/default.nix
index 59c95cff7..e658897da 100644
--- a/lass/5pkgs/xmonad-lass.nix
+++ b/lass/5pkgs/custom/xmonad-lass/default.nix
@@ -143,12 +143,21 @@ myKeyMap =
 
     , ("M4-d", floatNext True >> spawn "${pkgs.copyq}/bin/copyq show")
 
+    , ("M4-<F4>", spawn "${pkgs.writeDash "nm-dmenu" ''
+      export PATH=$PATH:${pkgs.dmenu}/bin:${pkgs.networkmanagerapplet}/bin
+      exec ${pkgs.networkmanager_dmenu}/bin/networkmanager_dmenu "$@"
+    ''}")
+
     , ("M4-<F5>", spawn "${pkgs.xorg.xbacklight}/bin/xbacklight -set 1")
     , ("M4-<F6>", spawn "${pkgs.xorg.xbacklight}/bin/xbacklight -set 10")
     , ("M4-<F7>", spawn "${pkgs.xorg.xbacklight}/bin/xbacklight -set 33")
     , ("M4-<F8>", spawn "${pkgs.xorg.xbacklight}/bin/xbacklight -set 100")
 
     , ("<Pause>", spawn "${pkgs.xcalib}/bin/xcalib -invert -alter")
+
+    --, ("M4-w", screenWorkspace 0 >>= (windows . W.greedyView))
+    --, ("M4-e", screenWorkspace 1 >>= (windows . W.greedyView))
+    --, ("M4-r", screenWorkspace 2 >>= (windows . W.greedyView))
     ]
 
 forkFile :: FilePath -> [String] -> Maybe [(String, String)] -> X ()
diff --git a/lass/5pkgs/default.nix b/lass/5pkgs/default.nix
index a158cd3c6..28482eb91 100644
--- a/lass/5pkgs/default.nix
+++ b/lass/5pkgs/default.nix
@@ -1,40 +1,39 @@
-{ config, pkgs, ... }@args:
+with import <stockholm/lib>;
+self: super: let
 
-{
-  nixpkgs.config.packageOverrides = rec {
-    acronym = pkgs.callPackage ./acronym/default.nix {};
-    dpass = pkgs.callPackage ./dpass {};
-    firefoxPlugins = {
-      noscript = pkgs.callPackage ./firefoxPlugins/noscript.nix {};
-      ublock = pkgs.callPackage ./firefoxPlugins/ublock.nix {};
-      vimperator = pkgs.callPackage ./firefoxPlugins/vimperator.nix {};
-    };
-    init = pkgs.callPackage ./init/default.nix args;
-    logify = pkgs.callPackage ./logify/default.nix {};
-    mk_sql_pair = pkgs.callPackage ./mk_sql_pair/default.nix {};
-    mpv-poll = pkgs.callPackage ./mpv-poll/default.nix {};
-    pop = pkgs.callPackage ./pop/default.nix {};
-    q = pkgs.callPackage ./q {};
-    rs = pkgs.callPackage ./rs/default.nix {};
-    urban = pkgs.callPackage ./urban/default.nix {};
-    xml2json = pkgs.callPackage ./xml2json/default.nix {};
-    xmonad-lass = import ./xmonad-lass.nix { inherit config pkgs; };
-    yt-next = pkgs.callPackage ./yt-next/default.nix {};
+  # This callPackage will try to detect obsolete overrides.
+  callPackage = path: args: let
+    override =  super.callPackage path args;
+    upstream = optionalAttrs (override ? "name")
+      (super.${(parseDrvName override.name).name} or {});
+  in if upstream ? "name" &&
+        override ? "name" &&
+        compareVersions upstream.name override.name != -1
+    then
+      trace
+        "Upstream `${upstream.name}' gets overridden by `${override.name}'."
+        override
+    else override;
 
-    bank = pkgs.writeDashBin "bank" ''
+   subdirsOf = path:
+     mapAttrs (name: _: path + "/${name}")
+              (filterAttrs (_: eq "directory") (readDir path));
+
+in {
+    bank = self.writeDashBin "bank" ''
       tmp=$(mktemp)
-      ${pkgs.pass}/bin/pass show hledger > $tmp
-      ${pkgs.hledger}/bin/hledger --file=$tmp "$@"
-      ${pkgs.pass}/bin/pass show hledger | if ${pkgs.diffutils}/bin/diff $tmp -; then
+      ${self.pass}/bin/pass show hledger > $tmp
+      ${self.hledger}/bin/hledger --file=$tmp "$@"
+      ${self.pass}/bin/pass show hledger | if ${self.diffutils}/bin/diff $tmp -; then
         exit 0
       else
-        ${pkgs.coreutils}/bin/cat $tmp | ${pkgs.pass}/bin/pass insert -m hledger
+        ${self.coreutils}/bin/cat $tmp | ${self.pass}/bin/pass insert -m hledger
       fi
-      ${pkgs.coreutils}/bin/rm $tmp
+      ${self.coreutils}/bin/rm $tmp
     '';
-    screengrab = pkgs.writeDashBin "screengrab" ''
-      resolution="$(${pkgs.xorg.xrandr}/bin/xrandr | ${pkgs.gnugrep}/bin/grep '*' | ${pkgs.gawk}/bin/awk '{print $1}')"
-      ${pkgs.ffmpeg}/bin/ffmpeg -f x11grab -r 25 -i :${toString config.services.xserver.display} -s $resolution -c:v huffyuv $1
-    '';
-  };
+    rtl8814au = callPackage ./custom/rtl8814au { kernel = self.linux; };
 }
+
+// mapAttrs (_: flip callPackage {})
+            (filterAttrs (_: dir: pathExists (dir + "/default.nix"))
+                         (subdirsOf ./.))
diff --git a/lass/default.nix b/lass/default.nix
index b1c7c1be8..d077cc09f 100644
--- a/lass/default.nix
+++ b/lass/default.nix
@@ -1,9 +1,9 @@
-_:
+{ pkgs, ... }:
 {
   imports = [
     ../krebs
     ./2configs
     ./3modules
-    ./5pkgs
   ];
+  nixpkgs.config.packageOverrides = import ./5pkgs pkgs;
 }