Update nix files

default.nix

@@ -1,10 +1,13 @@
-(import
-  (
-    let lock = builtins.fromJSON (builtins.readFile ./flake.lock); in
-    fetchTarball {
-      url = "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
-      sha256 = lock.nodes.flake-compat.locked.narHash;
-    }
-  )
-  { src = ./.; }
-).defaultNix
+{ pkgs ? import <nixpkgs> { }
+, lib ? import <nixpkgs/lib>
+}:
+pkgs.rustPlatform.buildRustPackage {
+  pname = "nix-editor";
+  version = "0.3.0";
+
+  src = [ ./. ];
+
+  cargoLock = {
+    lockFile = ./Cargo.lock;
+  };
+}

flake.nix

@@ -3,33 +3,36 @@
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
-    flake-utils.url = "github:numtide/flake-utils";
-    naersk.url = "github:nix-community/naersk";
-    flake-compat = {
-      url = "github:edolstra/flake-compat";
-      flake = false;
-    };
+    utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { self, nixpkgs, flake-utils, naersk, ... }:         
-  flake-utils.lib.eachDefaultSystem (system:
+  outputs = { self, nixpkgs, utils, ... }:
+    utils.lib.eachDefaultSystem (system:
       let
         pkgs = nixpkgs.legacyPackages.${system};
-        naersk-lib = naersk.lib."${system}";
+        name = "nix-editor";
       in
-  {
-    packages.nixeditor = naersk-lib.buildPackage {
-      pname = "nix-editor";
-      root = ./.;
-      };
+      rec
+      {
+        packages.${name} = pkgs.callPackage ./default.nix {
+          inherit (inputs);
+        };
+
+        # `nix build`
+        defaultPackage = packages.${name};
 
-    defaultPackage = self.packages.${system}.nixeditor;
+        # `nix run`
+        apps.${name} = utils.lib.mkApp {
+          inherit name;
+          drv = packages.${name};
+        };
+        defaultApp = apps.${name};
 
-    checks = self.packages.${system};
-    hydraJobs = self.packages.${system};
+        checks = self.packages.${system};
+        hydraJobs = self.packages.${system};
 
-    devShell = pkgs.mkShell {
-          buildInputs = with pkgs; [ 
+        devShell = pkgs.mkShell {
+          buildInputs = with pkgs; [
             rust-analyzer
             rustc
             rustfmt
@@ -38,5 +41,5 @@
             clippy
           ];
         };
-  });
+      });
 }