Dev dependencies.

utils/pub/sdk_source.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library sdk_source;
 
 import 'dart:async';
 
 import '../../pkg/pathos/lib/path.dart' as path;
 
@@ skipping 12 matching lines @@
 
   /// SDK packages are not individually versioned. Instead, their version is
   /// inferred from the revision number of the SDK itself.
   Future<Pubspec> describe(PackageId id) {
     return defer(() {
       var packageDir = _getPackagePath(id);
       // TODO(rnystrom): What if packageDir is null?
       var pubspec = new Pubspec.load(id.name, packageDir, systemCache.sources);
       // Ignore the pubspec's version, and use the SDK's.
       return new Pubspec(id.name, sdk.version, pubspec.dependencies,
-          pubspec.environment);
+          pubspec.devDependencies, pubspec.environment);
     });
   }
 
   /// Since all the SDK files are already available locally, installation just
   /// involves symlinking the SDK library into the packages directory.
   Future<bool> install(PackageId id, String destPath) {
     return defer(() {
       var path = _getPackagePath(id);
       if (path == null) return false;
 
       return createPackageSymlink(id.name, path, destPath).then((_) => true);
     });
   }
 
   /// Gets the path in the SDK's "pkg" directory to the directory containing
   /// package [id]. Returns `null` if the package could not be found.
   String _getPackagePath(PackageId id) {
     var pkgPath = path.join(sdk.rootDirectory, "pkg", id.description);
     return dirExists(pkgPath) ? pkgPath : null;
   }
 }