1 files changed, 22 insertions, 0 deletions
diff --git a/pkgs/simple/default.nix b/pkgs/simple/default.nix
new file mode 100644
index 0000000..1c4a53b
--- /dev/null
+++ b/pkgs/simple/default.nix
@@ -0,0 +1,22 @@
+self: super:
+
+let
+  inherit (super) lib;
+
+  mylib = import ../../lib/pure.nix {
+    inherit lib;
+  };
+
+  # This callPackage will try to detect obsolete overrides.
+  callPackage = path: args: let
+    override = self.callPackage path args;
+    upstream = lib.optionalAttrs (override ? "name")
+      (super.${(builtins.parseDrvName override.name).name} or {});
+  in if upstream ? "name" &&
+        override ? "name" &&
+        builtins.compareVersions upstream.name override.name != -1
+    then builtins.trace "Upstream `${upstream.name}' gets overridden by `${override.name}'." override
+    else override;
+in
+
+  mylib.mapNixDir (path: callPackage path {}) ./.