tv pkgs: mimic krebs' simple overlay

tv/5pkgs/default.nix

@@ -1,22 +1,18 @@
 with import <stockholm/lib>;
-self: 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;
+self: super:
 
-in {
+# Import files and subdirectories like they are overlays.
+foldl' mergeAttrs {}
+  (map
+    (name: import (./. + "/${name}") self super)
+    (filter
+      (name: name != "default.nix" && !hasPrefix "." name)
+      (attrNames (readDir ./.))))
 
+//
+
+{
   # TODO use XDG_RUNTIME_DIR?
   cr = self.writeDashBin "cr" ''
     set -efu
@@ -42,9 +38,4 @@ in {
       sha256 = "1as1i0j9d2n3iap9b471y4x01561r2s3vmjc5281qinirlr4al73";
     }) {};
   in nixpkgs-1509.wvdial;
-
 }
-
-// mapAttrs (_: flip callPackage {})
-            (filterAttrs (_: dir: pathExists (dir + "/default.nix"))
-                         (subdirsOf ./.))