diff --git a/overlay.nix b/overlay.nix
index 20d4e47..9d58206 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -1,7 +1,7 @@
-self: super: {
+final: prev: {
 
-  poetry2nix = import ./default.nix { pkgs = self; poetry = self.poetry; };
+  poetry2nix = import ./default.nix { pkgs = final; poetry = final.poetry; };
 
-  poetry = super.callPackage ./pkgs/poetry { python = self.python3; };
+  poetry = prev.callPackage ./pkgs/poetry { python = final.python3; };
 
 }