Provide means to add extra overlays to devhsell

Author: David Arnold

default.nix

@@ -1,7 +1,8 @@
 { nixpkgs ? import ./nix/nixpkgs.nix
 , system ? builtins.currentSystem
+, overlays ? []
 }:
 import nixpkgs {
   inherit system;
-  overlays = [ (import ./overlay.nix) ];
+  overlays = [ (import ./overlay.nix) ] ++ overlays;
 }