best practices: got rid of rec

pkgs/vdhcoapp/default.nix

@@ -16,58 +16,62 @@ let
   filepicker = callPackage ./filepicker.nix { };
 
 in
-buildNpmPackage rec {
-  pname = "vdhcoapp";
-  version = "2.0.19";
+buildNpmPackage (
+  let
+    version = "2.0.19";
+    pname = "vdhcoapp";
+    src = fetchFromGitHub {
+      owner = "aclap-dev";
+      repo = "${pname}";
+      rev = "v${version}";
+      hash = "sha256-8xeZvqpRq71aShVogiwlVD3gQoPGseNOmz5E3KbsZxU=";
+    };
+  in
+  {
+    inherit pname version src;
 
-  src = fetchFromGitHub {
-    owner = "aclap-dev";
-    repo = "vdhcoapp";
-    rev = "v${version}";
-    hash = "sha256-8xeZvqpRq71aShVogiwlVD3gQoPGseNOmz5E3KbsZxU=";
-  };
+    sourceRoot = "${src.name}/app";
+    npmDepsHash = "sha256-E032U2XZdyTER6ROkBosOTn7bweDXHl8voC3BQEz8Wg=";
+    dontNpmBuild = true;
 
-  sourceRoot = "${src.name}/app";
-  npmDepsHash = "sha256-E032U2XZdyTER6ROkBosOTn7bweDXHl8voC3BQEz8Wg=";
-  dontNpmBuild = true;
+    nativeBuildInputs = [
+      toml2json
+      makeWrapper
+    ];
 
-  nativeBuildInputs = [
-    toml2json
-    makeWrapper
-  ];
+    patches = [
+      (substituteAll {
+        src = ./code.patch;
+        inherit ffmpeg;
+        filepicker = lib.getExe filepicker;
+      })
+    ];
 
-  patches = [
-    (substituteAll {
-      src = ./code.patch;
-      inherit ffmpeg;
-      filepicker = lib.getExe filepicker;
-    })
-  ];
+    postPatch = ''
+      # Cannot use patch, setting placeholder here
+      substituteInPlace src/native-autoinstall.js \
+        --replace process.execPath "\"${placeholder "out"}/bin/vdhcoapp\""
+    '';
 
-  postPatch = ''
-    # Cannot use patch, setting placeholder here
-    substituteInPlace src/native-autoinstall.js \
-      --replace process.execPath "\"${placeholder "out"}/bin/vdhcoapp\""
-  '';
+    preBuild = ''
+      toml2json --pretty ../config.toml > src/config.json
+    '';
 
-  preBuild = ''
-    toml2json --pretty ../config.toml > src/config.json
-  '';
+    installPhase = ''
+      mkdir -p $out/opt/vdhcoapp
 
-  installPhase = ''
-    mkdir -p $out/opt/vdhcoapp
+      cp -r . "$out/opt/vdhcoapp"
 
-    cp -r . "$out/opt/vdhcoapp"
+      makeWrapper ${nodejs}/bin/node $out/bin/vdhcoapp \
+        --add-flags $out/opt/vdhcoapp/src/main.js
+    '';
 
-    makeWrapper ${nodejs}/bin/node $out/bin/vdhcoapp \
-      --add-flags $out/opt/vdhcoapp/src/main.js
-  '';
-
-  meta = with lib; {
-    description = "Companion application for the Video DownloadHelper browser add-on";
-    homepage = "https://www.downloadhelper.net/";
-    license = licenses.gpl2;
-    maintainers = with maintainers; [ wolfangaukang ];
-    mainProgram = "vdhcoapp";
-  };
-}
+    meta = with lib; {
+      description = "Companion application for the Video DownloadHelper browser add-on";
+      homepage = "https://www.downloadhelper.net/";
+      license = licenses.gpl2;
+      maintainers = with maintainers; [ wolfangaukang ];
+      mainProgram = "vdhcoapp";
+    };
+  }
+)