nix: create package output and editor-friendly devshell

flake.nix

@@ -47,7 +47,30 @@
               ]
             );
           };
-        }
-      );
+
+          dev = pkgs.mkShell {
+            inputsFrom = [ self.devShells.${system}.default ];
+            nativeBuildInputs = with pkgs; [
+              rust-analyzer
+              rustfmt
+              clippy
+            ];
+          };
+        }
+      );
+
+      packages = forEachSystem (
+        system: pkgs: {
+          default = pkgs.jay.overrideAttrs (_: {
+            pname = "wry";
+            version = "unstable-${toString self.lastModified}";
+            src = ./.;
+            cargoDeps = pkgs.rustPlatform.importCargoLock {
+              lockFile = ./Cargo.lock;
+            };
+          });
+        }
+      );
+
     };
 }