Adds the new iohk overlay

Author: bladyjoker

pkgs.nix

@@ -6,33 +6,16 @@
     _module.args = {
       pkgs = import inputs.nixpkgs {
         inherit system;
-        inherit (inputs.haskell-nix) config;
-        overlays = [
-          inputs.haskell-nix.overlay
-          # inputs.iohk-nix.overlays.crypto
-          # (import inputs.rust-overlay)
-        ];
       };
 
-      # TODO(bladyjoker): If we use recent nixpkgs we get: `error: nodejs_14 has been removed as it is EOL`. That's why we use CTL's old nixpkgs.
-      # pkgsForCtl = import inputs.ctl.inputs.nixpkgs {
-      #   inherit system;
-      #   inherit (inputs.haskell-nix) config;
-      #   overlays = [
-      #     inputs.haskell-nix.overlay
-      #     inputs.iohk-nix.overlays.crypto
-      #     inputs.ctl.overlays.purescript
-      #     inputs.ctl.overlays.spago
-      #   ];
-      # };
-
       # TODO(bladyjoker): haskell.nix is brittle on its nixpkgs, and tends to break stuff for us, so we instantiate haskell.nix nixpkgs specifically. For example https://github.com/Plutonomicon/plutarch-plutus/pull/624
       pkgsForHaskellNix = import inputs.haskell-nix.inputs.nixpkgs {
         inherit system;
         inherit (inputs.haskell-nix) config;
         overlays = [
           inputs.haskell-nix.overlay
           inputs.iohk-nix.overlays.crypto
+          inputs.iohk-nix.overlays.haskell-nix-crypto
         ];
       };