diff --git a/flake.nix b/flake.nix
index 119e6b6..40770de 100644
--- a/flake.nix
+++ b/flake.nix
@@ -12,7 +12,7 @@
         naersk-lib = pkgs.callPackage naersk { };
       in
       {
-        defaultPackage = with pkgs; naersk-lib.buildPackage {
+        packages.default = with pkgs; naersk-lib.buildPackage {
           name = "openpgp-card";
           src = ./.;
           buildInputs = [ cargo rustc rustfmt pcsclite nettle pre-commit rustPackages.clippy ];
@@ -24,5 +24,9 @@
           nativeBuildInputs = [ pkg-config rustPlatform.bindgenHook ];
           RUST_SRC_PATH = rustPlatform.rustLibSrc;
         };
+
+        overlays.default = (final: prev: {
+           openpgp-card = self.packages.${prev.system}.default;
+        });
       });
 }