Having issues with my sway-borders overlay, any idea what could be going wrong?

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Hi, I wanted to replace sway with sway-borders, so I could use rounded corners/shadows with sway. I have the following overlay:

    overlays.sway = final: prev: {
      sway = prev.sway.overrideAttrs (old: rec {
        src = final.fetchFromGitHub {
          owner = "fluix-dev";
          repo = "sway-borders";
          rev = "2512828b95463c52f6cb3df7c04dab60ef8b0407";
          sha256 = "sha256-5XRXncQShg9HbHy2KKrnmCPDs2mvHEa5UXf8+nsQBFM=";
        };
      });
    };

When I run sudo nixos-rebuild switch --flake . , it downloads the source, and compiles sway as expected. However upon rebooting, I’m still using stock sway and it throws an error for by borders config.

Any idea what could be happening?

flake.nix: nix-darwin-dotfiles/flake.nix at a1ed0c1dc58449a0fd688eabedf23545fb63b1ce · shaunsingh/nix-darwin-dotfiles · GitHub

configuration.nix: nix-darwin-dotfiles/configuration.nix at a1ed0c1dc58449a0fd688eabedf23545fb63b1ce · shaunsingh/nix-darwin-dotfiles · GitHub