diff --git a/pkgs/default.nix b/pkgs/default.nix
index 3c35a2d9..0f9a27af 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -1,27 +1,33 @@
-{ pkgs ? import <nixpkgs> { } }:
+{ pkgs ? import <nixpkgs> { }, overrides ? (self: super: { }) }:
 
-with pkgs; {
-  doggo = callPackage ./doggo.nix { };
-  gnome-shell-extension-pop-shell =
-    callPackage ./gnome-shell-extension-pop-shell.nix { };
-  gnome-shell-extension-burn-my-windows =
-    callPackage ./gnome-shell-extension-burn-my-windows.nix { };
-  gnome-shell-extension-desktop-cube =
-    callPackage ./gnome-shell-extension-desktop-cube.nix { };
-  gnome-shell-extension-fly-pie =
-    callPackage ./gnome-shell-extension-fly-pie.nix { };
-  guile-config = callPackage ./guile-config.nix { };
-  guile-hall = callPackage ./guile-hall.nix { };
-  junction = callPackage ./junction.nix { };
-  libcs50 = callPackage ./libcs50.nix { };
-  llama = callPackage ./llama.nix { };
-  neo = callPackage ./neo.nix { };
-  pop-launcher = callPackage ./pop-launcher.nix { };
-  pop-launcher-plugin-duckduckgo-bangs =
-    callPackage ./pop-launcher-plugin-duckduckgo-bangs.nix { };
-  photon-rss = callPackage ./photon-rss.nix { };
-  ratt = callPackage ./ratt.nix { };
-  tic-80 = callPackage ./tic-80 { };
-  sioyek = libsForQt5.callPackage ./sioyek.nix { };
-  vpaint = libsForQt5.callPackage ./vpaint.nix { };
-}
+with pkgs;
+
+let
+  packages = self:
+    let callPackage = newScope self;
+  in {
+    doggo = callPackage ./doggo.nix { };
+    gnome-shell-extension-burn-my-windows =
+      callPackage ./gnome-shell-extension-burn-my-windows.nix { };
+    gnome-shell-extension-desktop-cube =
+      callPackage ./gnome-shell-extension-desktop-cube.nix { };
+    gnome-shell-extension-fly-pie =
+      callPackage ./gnome-shell-extension-fly-pie.nix { };
+    gnome-shell-extension-pop-shell =
+      callPackage ./gnome-shell-extension-pop-shell.nix { };
+    guile-config = callPackage ./guile-config.nix { };
+    guile-hall = callPackage ./guile-hall.nix { };
+    junction = callPackage ./junction.nix { };
+    libcs50 = callPackage ./libcs50.nix { };
+    llama = callPackage ./llama.nix { };
+    neo = callPackage ./neo.nix { };
+    pop-launcher = callPackage ./pop-launcher.nix { };
+    pop-launcher-plugin-duckduckgo-bangs =
+      callPackage ./pop-launcher-plugin-duckduckgo-bangs.nix { };
+    photon-rss = callPackage ./photon-rss.nix { };
+    ratt = callPackage ./ratt.nix { };
+    tic-80 = callPackage ./tic-80 { };
+    sioyek = libsForQt5.callPackage ./sioyek.nix { };
+    vpaint = libsForQt5.callPackage ./vpaint.nix { };
+  };
+in lib.fix (lib.extends overrides packages)