Add release.nix

default.nix

@@ -1,5 +1,5 @@
-{ pkgs ? (import <nixpkgs> {}) }:
+{ python }:
-with pkgs.python3Packages;
+with python.pkgs;
 buildPythonPackage rec {
   name = "mqtt-dash";
   src = ./.;

release.nix

@@ -5,8 +5,5 @@
       let
         pkgs = import <nixpkgs> { inherit system; };
       in
-        pkgs.releaseTools.nixBuild {
+        pkgs.callPackage ./. { python = pkgs.python3; };
-          name = "mqtt-dash";
-          src = <mqtt-dash-src>;
-        };
 }