diff --git a/pins.nix b/pins.nix
index 71d3b467d..223ca2248 100644
--- a/pins.nix
+++ b/pins.nix
@@ -1,11 +1,11 @@
 {
   core = builtins.fetchGit {
     url = "https://github.com/ekala-project/corepkgs.git";
-    rev = "7f4e2ddd8922722f92f9f13a7eba3e36d2cc0387";
+    rev = "81e84032efee5ab2863aa356fea6a5286547d23b";
   };
 
   lib = builtins.fetchGit {
     url = "https://github.com/jonringer/nix-lib.git";
-    rev = "c19c816e39d14a60dd368d601aa9b389b09d0bbb";
+    rev = "2c14377c3f3825e2cd5ebf43858ec4aaac5bffde";
   };
 }
diff --git a/pkgs-module.nix b/pkgs-module.nix
index bb5de0751..669a11192 100644
--- a/pkgs-module.nix
+++ b/pkgs-module.nix
@@ -1,7 +1,7 @@
+{ lib, ... }:
+
 let
-  pins = import ./pins.nix;
-  lib = import pins.lib;
-  pythonOverlay = lib.mkAutoCalledPackageDir ./pkgs;
+  pythonOverlay = lib.packageSets.mkAutoCalledPackageDir ./pkgs;
   pythonOverrides = import ./python-packages.nix;
   pkgsOverlay = import ./top-level.nix;
 in
diff --git a/pkgs/deepmerge/default.nix b/pkgs/deepmerge/default.nix
index 0f8e031f5..e9d45b1a6 100644
--- a/pkgs/deepmerge/default.nix
+++ b/pkgs/deepmerge/default.nix
@@ -8,12 +8,12 @@
 
 buildPythonPackage rec {
   pname = "deepmerge";
-  version = "2.0";
+  version = "2.1.0";
   pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-XD2GCB++vQTdXeA2JqBge4CamPtsy6V3C2JGb+lA/yA=";
+    hash = "sha256-B8p6e4k131lsUS+oFhh3wEh6xh9pHAd2bn1x0rI73S8=";
   };
 
   build-system = [
diff --git a/repos-packages.nix b/repos-packages.nix
new file mode 100644
index 000000000..bbba34527
--- /dev/null
+++ b/repos-packages.nix
@@ -0,0 +1,14 @@
+{ ... }:
+let
+  pins = import ./pins.nix;
+  lib = import pins.lib;
+  pythonOverlay = lib.packageSets.mkAutoCalledPackageDir ./pkgs;
+  pythonOverrides = import ./python-packages.nix;
+  pkgs = import pins.core { modules = [ (import ./pkgs-module.nix) ]; };
+  mkProjection = overlay: base: lib.fix (self: base // overlay self base);
+  combinedOverlay = lib.composeManyExtensions [ pythonOverlay pythonOverrides ];
+  projected = mkProjection combinedOverlay pkgs.python3Packages;
+  # Only expose attrs defined by the overlay, not the full base set
+  overlayKeys = lib.composeManyExtensions [ pythonOverlay pythonOverrides ] (_: _: { }) { };
+in
+  removeAttrs (builtins.intersectAttrs overlayKeys projected) [ "_internalCallByNamePackageFile" ]