Fix derivation name

flake.nix

@@ -86,7 +86,6 @@
                         dontConfigure = true;
                         dontInstall = true;
                         buildPhase = ''
-                          mypy --version
                           mkdir $out
                           mypy --strict huecli --junit-xml $out/junit.xml
                         '';
@@ -122,22 +121,33 @@
         let
           pkgs = nixpkgs.legacyPackages.${system};
           pythonSet = pythonSets.${system};
+          venv = pythonSet.mkVirtualEnv "huecli-env" workspace.deps.default;
         in
         {
-          default = (pythonSet.mkVirtualEnv "huecli" workspace.deps.default).overrideAttrs (
-            _final: prev: {
-              nativeBuildInputs = prev.nativeBuildInputs ++ [ pkgs.installShellFiles ];
-              postInstall = ''
-                installShellCompletion --cmd huecli \
-                --bash <($out/bin/huecli --show-completion bash) \
-                --zsh <($out/bin/huecli --show-completion zsh) \
-                --fish <($out/bin/huecli --show-completion fish)
-              '';
-            }
-          );
+          default = pkgs.stdenv.mkDerivation {
+            pname = "huecli";
+            version = pythonSet.huecli.version;
+            dontConfigure = true;
+            dontUnpack = true;
+            dontBuild = true;
+            buildInputs = [ venv ];
+            nativeBuildInputs = [ pkgs.installShellFiles ];
+            postInstall = ''
+              mkdir -p $out/bin
+              ln -s ${venv}/bin/huecli $out/bin/huecli
+              installShellCompletion --cmd huecli \
+              --bash <($out/bin/huecli --show-completion bash) \
+              --zsh <($out/bin/huecli --show-completion zsh) \
+              --fish <($out/bin/huecli --show-completion fish)
+            '';
+          };
         }
       );
 
+      overlays.default = final: prev: {
+        huecli = self.packages.${prev.system}.default;
+      };
+
       # Use an editable Python set for development.
       devShells = forAllSystems (
         system: