tv pkgs: callPackage all subdirs

tv/5pkgs/default.nix

@@ -1,7 +1,24 @@
 { config, pkgs, ... }:
 with import <stockholm/lib>;
 {
-  nixpkgs.config.packageOverrides = super: {
+  nixpkgs.config.packageOverrides = super: let
+
+    # 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 `${override.name}'." override
+      else override;
+
+  in {}
+  // mapAttrs (_: flip callPackage {})
+              (filterAttrs (_: dir: pathExists (dir + "/default.nix"))
+                           (subdirsOf ./.))
+  // {
     # TODO use XDG_RUNTIME_DIR?
     cr = pkgs.writeDashBin "cr" ''
       set -efu
@@ -12,7 +29,7 @@ with import <stockholm/lib>;
           --disk-cache-size=50000000 \
           "$@"
     '';
-    ejabberd = pkgs.callPackage ./ejabberd {
+    ejabberd = callPackage ./ejabberd {
       erlang = pkgs.erlangR16;
     };
     ff = pkgs.writeDashBin "ff" ''
@@ -22,8 +39,5 @@ with import <stockholm/lib>;
       if elem config.krebs.build.host.name ["xu" "wu"]
         then super.gnupg21
         else super.gnupg;
-    q = pkgs.callPackage ./q {};
-    viljetic-pages = pkgs.callPackage ./viljetic-pages {};
-    xmonad-tv = import ./xmonad-tv.nix { inherit pkgs; };
   };
 }