fix the flake

flake.nix

@@ -12,18 +12,41 @@
         pkgs = nixpkgs.legacyPackages.${system};
         base-requirements = builtins.readFile ./requirements/base.txt;
         pyEnv = mach-nix.lib."${system}".mkPython {
-          requirements = base-requirements;
-        };
-      in
-      rec {
-        devShell = mach-nix.lib."${system}".mkPythonShell {
           requirements = base-requirements + ''
-            flake8
             autopep8
+            flake8
             pytest
             pytest-cov
             pyinstaller
           '';
         };
+      in
+      rec {
+        devShell."${system}" = pkgs.mkShell {
+          buildInputs = [ pyEnv ];
+        };
+        packages = {
+          binary = pkgs.stdenv.mkDerivation rec {
+            name = "todoist_interface";
+            src = self;
+            buildInputs = [
+              pkgs.coreutils
+              pkgs.glibc
+              pkgs.bintools-unwrapped
+              pyEnv
+            ];
+            phases = [ "unpackPhase" "buildPhase" "installPhase" ];
+            buildPhase = ''
+              export PATH="${pkgs.lib.makeBinPath buildInputs}";
+              python -m pytest tests
+              pyinstaller -F todoist_interface/__main__.py -n todoist_interface
+            '';
+            installPhase = ''
+              mkdir -p $out
+              cp /build/source/dist/todoist_interface "$out/todoist_interface"
+            '';
+          };
+        };
+        defaultPackage = packages.binary;
       });
 }