diff --git a/packages/flutter_tools/bin/fuchsia_tester.dart b/packages/flutter_tools/bin/fuchsia_tester.dart
index e326d67848..0a3fe3bbff 100644
--- a/packages/flutter_tools/bin/fuchsia_tester.dart
+++ b/packages/flutter_tools/bin/fuchsia_tester.dart
@@ -14,7 +14,6 @@ import 'package:flutter_tools/src/base/io.dart';
 import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/cache.dart';
 import 'package:flutter_tools/src/context_runner.dart';
-import 'package:flutter_tools/src/dart/package_map.dart';
 import 'package:flutter_tools/src/artifacts.dart';
 import 'package:flutter_tools/src/globals.dart' as globals;
 import 'package:flutter_tools/src/project.dart';
@@ -108,13 +107,11 @@ Future<void> run(List<String> args) async {
     // TODO(tvolkert): Remove once flutter_tester no longer looks for this.
     globals.fs.link(sdkRootDest.childFile('platform.dill').path).createSync('platform_strong.dill');
 
-    globalPackagesPath =
-        globals.fs.path.normalize(globals.fs.path.absolute(argResults[_kOptionPackages] as String));
-
     Directory testDirectory;
     CoverageCollector collector;
     if (argResults['coverage'] as bool) {
       collector = CoverageCollector(
+        packagesPath: globals.fs.path.normalize(globals.fs.path.absolute(argResults[_kOptionPackages] as String)),
         libraryPredicate: (String libraryName) {
           // If we have a specified coverage directory then accept all libraries.
           if (coverageDirectory != null) {
@@ -147,7 +144,12 @@ Future<void> run(List<String> args) async {
       watcher: collector,
       ipv6: false,
       enableObservatory: collector != null,
-      buildInfo: BuildInfo.debug,
+      buildInfo: BuildInfo(
+        BuildMode.debug,
+        '',
+        treeShakeIcons: false,
+        packagesPath: globals.fs.path.normalize(globals.fs.path.absolute(argResults[_kOptionPackages] as String),
+      )),
       precompiledDillFiles: tests,
       concurrency: math.max(1, globals.platform.numberOfProcessors - 2),
       icudtlPath: globals.fs.path.absolute(argResults[_kOptionIcudtl] as String),
diff --git a/packages/flutter_tools/lib/src/build_info.dart b/packages/flutter_tools/lib/src/build_info.dart
index 3faa246cfd..ad99ac9e88 100644
--- a/packages/flutter_tools/lib/src/build_info.dart
+++ b/packages/flutter_tools/lib/src/build_info.dart
@@ -32,7 +32,7 @@ class BuildInfo {
     this.dartExperiments = const <String>[],
     @required this.treeShakeIcons,
     this.performanceMeasurementFile,
-    this.packagesPath = '.packages',
+    this.packagesPath = '.packages', // TODO(jonahwilliams): make this required and remove the default.
     this.nullSafetyMode = NullSafetyMode.autodetect,
     this.codeSizeDirectory,
     this.androidGradleDaemon = true,
diff --git a/packages/flutter_tools/lib/src/bundle.dart b/packages/flutter_tools/lib/src/bundle.dart
index f200ab6306..2782ebd522 100644
--- a/packages/flutter_tools/lib/src/bundle.dart
+++ b/packages/flutter_tools/lib/src/bundle.dart
@@ -81,9 +81,7 @@ class BundleBuilder {
     String manifestPath = defaultManifestPath,
     String applicationKernelFilePath,
     String depfilePath,
-    String privateKeyPath = defaultPrivateKeyPath,
     String assetDirPath,
-    String packagesPath,
     bool precompiledSnapshot = false,
     bool reportLicensedPackages = false,
     bool trackWidgetCreation = false,
@@ -96,7 +94,6 @@ class BundleBuilder {
     mainPath ??= defaultMainPath;
     depfilePath ??= defaultDepfilePath;
     assetDirPath ??= getAssetBuildDirectory();
-    packagesPath ??= globals.fs.path.absolute('.packages');
     final FlutterProject flutterProject = FlutterProject.current();
     await buildWithAssemble(
       buildMode: buildInfo.mode,
diff --git a/packages/flutter_tools/lib/src/cache.dart b/packages/flutter_tools/lib/src/cache.dart
index 5ff744794c..9a39f80311 100644
--- a/packages/flutter_tools/lib/src/cache.dart
+++ b/packages/flutter_tools/lib/src/cache.dart
@@ -741,7 +741,7 @@ class PubDependencies extends ArtifactSet {
     FileSystem fileSystem,
   ) async {
     final File toolPackageConfig = fileSystem.file(
-      fileSystem.path.join(_flutterRoot(), 'packages', 'flutter_tools', kPackagesFileName),
+      fileSystem.path.join(_flutterRoot(), 'packages', 'flutter_tools', '.dart_tool', 'package_config.json'),
     );
     if (!toolPackageConfig.existsSync()) {
       return false;
diff --git a/packages/flutter_tools/lib/src/commands/build_bundle.dart b/packages/flutter_tools/lib/src/commands/build_bundle.dart
index 93378e1b8f..3c22935649 100644
--- a/packages/flutter_tools/lib/src/commands/build_bundle.dart
+++ b/packages/flutter_tools/lib/src/commands/build_bundle.dart
@@ -121,7 +121,6 @@ class BuildBundleCommand extends BuildSubCommand {
       mainPath: targetFile,
       manifestPath: stringArg('manifest'),
       depfilePath: stringArg('depfile'),
-      privateKeyPath: stringArg('private-key'),
       assetDirPath: stringArg('asset-dir'),
       precompiledSnapshot: boolArg('precompiled'),
       reportLicensedPackages: boolArg('report-licensed-packages'),
diff --git a/packages/flutter_tools/lib/src/commands/test.dart b/packages/flutter_tools/lib/src/commands/test.dart
index 2a38df53fa..13848b9fd2 100644
--- a/packages/flutter_tools/lib/src/commands/test.dart
+++ b/packages/flutter_tools/lib/src/commands/test.dart
@@ -171,6 +171,7 @@ class TestCommand extends FlutterCommand {
     final List<String> plainNames = stringsArg('plain-name');
     final String tags = stringArg('tags');
     final String excludeTags = stringArg('exclude-tags');
+    final BuildInfo buildInfo = getBuildInfo(forcedBuildMode: BuildMode.debug);
 
     if (buildTestAssets && flutterProject.manifest.assets.isNotEmpty) {
       await _buildTestAsset();
@@ -225,6 +226,8 @@ class TestCommand extends FlutterCommand {
       collector = CoverageCollector(
         verbose: !machine,
         libraryPredicate: (String libraryName) => libraryName.contains(projectName),
+        // TODO(jonahwilliams): file bug for incorrect URI handling on windws
+        packagesPath: globals.fs.path.absolute('.packages'),
       );
     }
 
@@ -236,7 +239,6 @@ class TestCommand extends FlutterCommand {
     }
 
     final bool disableServiceAuthCodes = boolArg('disable-service-auth-codes');
-    final BuildInfo buildInfo = getBuildInfo(forcedBuildMode: BuildMode.debug);
 
     final int result = await testRunner.runTests(
       testWrapper,
diff --git a/packages/flutter_tools/lib/src/dart/package_map.dart b/packages/flutter_tools/lib/src/dart/package_map.dart
index 0667695526..981369a7b1 100644
--- a/packages/flutter_tools/lib/src/dart/package_map.dart
+++ b/packages/flutter_tools/lib/src/dart/package_map.dart
@@ -11,23 +11,10 @@ import '../base/common.dart';
 import '../base/file_system.dart';
 import '../base/logger.dart';
 
-const String kPackagesFileName = '.packages';
-
-// No touching!
-String get globalPackagesPath => _globalPackagesPath ?? kPackagesFileName;
-
-set globalPackagesPath(String value) {
-  _globalPackagesPath = value;
-}
-
-bool get isUsingCustomPackagesPath => _globalPackagesPath != null;
-
-String _globalPackagesPath;
-
 /// Load the package configuration from [file] or throws a [ToolExit]
 /// if the operation would fail.
 ///
-/// If [nonFatal] is true, in the event of an error an empty package
+/// If [throwOnError] is false, in the event of an error an empty package
 /// config is returned.
 Future<PackageConfig> loadPackageConfigWithLogging(File file, {
   @required Logger logger,
diff --git a/packages/flutter_tools/lib/src/isolated/devfs_web.dart b/packages/flutter_tools/lib/src/isolated/devfs_web.dart
index 899031e0b6..f4b3074125 100644
--- a/packages/flutter_tools/lib/src/isolated/devfs_web.dart
+++ b/packages/flutter_tools/lib/src/isolated/devfs_web.dart
@@ -1092,7 +1092,7 @@ Future<Directory> _loadDwdsDirectory(
   final String toolPackagePath =
       fileSystem.path.join(Cache.flutterRoot, 'packages', 'flutter_tools');
   final String packageFilePath =
-      fileSystem.path.join(toolPackagePath, kPackagesFileName);
+      fileSystem.path.join(toolPackagePath, '.dart_tool', 'package_config.json');
   final PackageConfig packageConfig = await loadPackageConfigWithLogging(
     fileSystem.file(packageFilePath),
     logger: logger,
diff --git a/packages/flutter_tools/lib/src/resident_runner.dart b/packages/flutter_tools/lib/src/resident_runner.dart
index 2126079033..8897db38fc 100644
--- a/packages/flutter_tools/lib/src/resident_runner.dart
+++ b/packages/flutter_tools/lib/src/resident_runner.dart
@@ -369,9 +369,8 @@ class FlutterDevice {
 
   Future<Uri> setupDevFS(
     String fsName,
-    Directory rootDirectory, {
-    String packagesFilePath,
-  }) {
+    Directory rootDirectory,
+  ) {
     // One devFS per device. Shared by all running instances.
     devFS = DevFS(
       vmService,
diff --git a/packages/flutter_tools/lib/src/run_hot.dart b/packages/flutter_tools/lib/src/run_hot.dart
index 55347ac54e..d24c6e85c5 100644
--- a/packages/flutter_tools/lib/src/run_hot.dart
+++ b/packages/flutter_tools/lib/src/run_hot.dart
@@ -366,7 +366,6 @@ class HotRunner extends ResidentRunner {
         await device.setupDevFS(
           fsName,
           globals.fs.directory(projectRootPath),
-          packagesFilePath: packagesFilePath,
         ),
     ];
   }
diff --git a/packages/flutter_tools/lib/src/runner/flutter_command.dart b/packages/flutter_tools/lib/src/runner/flutter_command.dart
index cd926a543b..f589b89533 100644
--- a/packages/flutter_tools/lib/src/runner/flutter_command.dart
+++ b/packages/flutter_tools/lib/src/runner/flutter_command.dart
@@ -21,7 +21,6 @@ import '../build_system/targets/icon_tree_shaker.dart' show kIconTreeShakerEnabl
 import '../bundle.dart' as bundle;
 import '../cache.dart';
 import '../dart/generate_synthetic_packages.dart';
-import '../dart/package_map.dart';
 import '../dart/pub.dart';
 import '../device.dart';
 import '../features.dart';
@@ -882,7 +881,8 @@ abstract class FlutterCommand extends Command<void> {
       bundleSkSLPath: bundleSkSLPath,
       dartExperiments: experiments,
       performanceMeasurementFile: performanceMeasurementFile,
-      packagesPath: globalResults['packages'] as String ?? '.packages',
+      packagesPath: globalResults['packages'] as String
+        ?? globals.fs.path.absolute('.dart_tool', 'package_config.json'),
       nullSafetyMode: nullSafetyMode,
       codeSizeDirectory: codeSizeDirectory,
       androidGradleDaemon: androidGradleDaemon,
@@ -1174,7 +1174,7 @@ abstract class FlutterCommand extends Command<void> {
   @protected
   @mustCallSuper
   Future<void> validateCommand() async {
-    if (_requiresPubspecYaml && !isUsingCustomPackagesPath) {
+    if (_requiresPubspecYaml && !globalResults.wasParsed('packages')) {
       // Don't expect a pubspec.yaml file if the user passed in an explicit .packages file path.
 
       // If there is no pubspec in the current directory, look in the parent
diff --git a/packages/flutter_tools/lib/src/runner/flutter_command_runner.dart b/packages/flutter_tools/lib/src/runner/flutter_command_runner.dart
index 66d31bb0b7..b3301f825d 100644
--- a/packages/flutter_tools/lib/src/runner/flutter_command_runner.dart
+++ b/packages/flutter_tools/lib/src/runner/flutter_command_runner.dart
@@ -16,7 +16,6 @@ import '../base/user_messages.dart';
 import '../base/utils.dart';
 import '../cache.dart';
 import '../convert.dart';
-import '../dart/package_map.dart';
 import '../globals.dart' as globals;
 import '../tester/flutter_tester.dart';
 
@@ -82,19 +81,9 @@ class FlutterCommandRunner extends CommandRunner<void> {
     argParser.addFlag('suppress-analytics',
         negatable: false,
         help: 'Suppress analytics reporting when this command runs.');
-
-    String packagesHelp;
-    bool showPackagesCommand;
-    if (globals.fs.isFileSync(kPackagesFileName)) {
-      packagesHelp = '(defaults to "$kPackagesFileName")';
-      showPackagesCommand = verboseHelp;
-    } else {
-      packagesHelp = '(required, since the current directory does not contain a "$kPackagesFileName" file)';
-      showPackagesCommand = true;
-    }
     argParser.addOption('packages',
-        hide: !showPackagesCommand,
-        help: 'Path to your ".packages" file.\n$packagesHelp');
+        hide: !verboseHelp,
+        help: 'Path to your "package_config.json" file.');
     if (verboseHelp) {
       argParser.addSeparator('Local build selection options (not normally required):');
     }
@@ -219,7 +208,8 @@ class FlutterCommandRunner extends CommandRunner<void> {
     // Set up the tooling configuration.
     final EngineBuildPaths engineBuildPaths = await globals.localEngineLocator.findEnginePath(
       topLevelResults['local-engine-src-path'] as String,
-      topLevelResults['local-engine'] as String
+      topLevelResults['local-engine'] as String,
+      topLevelResults['packages'] as String,
     );
     if (engineBuildPaths != null) {
       contextOverrides.addAll(<Type, dynamic>{
@@ -254,10 +244,6 @@ class FlutterCommandRunner extends CommandRunner<void> {
           await globals.flutterVersion.checkFlutterVersionFreshness();
         }
 
-        if (topLevelResults.wasParsed('packages')) {
-          globalPackagesPath = globals.fs.path.normalize(globals.fs.path.absolute(topLevelResults['packages'] as String));
-        }
-
         // See if the user specified a specific device.
         globals.deviceManager.specifiedDeviceId = topLevelResults['device-id'] as String;
 
diff --git a/packages/flutter_tools/lib/src/runner/local_engine.dart b/packages/flutter_tools/lib/src/runner/local_engine.dart
index 05bb4bda03..82a9a5178f 100644
--- a/packages/flutter_tools/lib/src/runner/local_engine.dart
+++ b/packages/flutter_tools/lib/src/runner/local_engine.dart
@@ -47,13 +47,16 @@ class LocalEngineLocator {
   final UserMessages _userMessages;
 
   /// Returns the engine build path of a local engine if one is located, otherwise `null`.
-  Future<EngineBuildPaths> findEnginePath(String engineSourcePath, String localEngine) async {
+  Future<EngineBuildPaths> findEnginePath(String engineSourcePath, String localEngine, String packagePath) async {
     engineSourcePath ??= _platform.environment[kFlutterEngineEnvironmentVariableName];
 
     if (engineSourcePath == null && localEngine != null) {
       try {
         final PackageConfig packageConfig = await loadPackageConfigWithLogging(
-          _fileSystem.file(globalPackagesPath),
+          _fileSystem.file(
+            // TODO(jonahwilliams): update to package_config
+            packagePath ?? _fileSystem.path.join('.packages'),
+          ),
           logger: _logger,
           throwOnError: false,
         );
diff --git a/packages/flutter_tools/lib/src/template.dart b/packages/flutter_tools/lib/src/template.dart
index cb3e98036c..f6dc6c2475 100644
--- a/packages/flutter_tools/lib/src/template.dart
+++ b/packages/flutter_tools/lib/src/template.dart
@@ -281,7 +281,7 @@ Directory _templateDirectoryInPackage(String name, FileSystem fileSystem) {
 Future<Directory> _templateImageDirectory(String name, FileSystem fileSystem, Logger logger) async {
   final String toolPackagePath = fileSystem.path.join(
       Cache.flutterRoot, 'packages', 'flutter_tools');
-  final String packageFilePath = fileSystem.path.join(toolPackagePath, kPackagesFileName);
+  final String packageFilePath = fileSystem.path.join(toolPackagePath, '.dart_tool', 'package_config.json');
   final PackageConfig packageConfig = await loadPackageConfigWithLogging(
     fileSystem.file(packageFilePath),
     logger: logger,
diff --git a/packages/flutter_tools/lib/src/test/coverage_collector.dart b/packages/flutter_tools/lib/src/test/coverage_collector.dart
index 48850df5ae..94a8aa157f 100644
--- a/packages/flutter_tools/lib/src/test/coverage_collector.dart
+++ b/packages/flutter_tools/lib/src/test/coverage_collector.dart
@@ -3,13 +3,13 @@
 // found in the LICENSE file.
 
 import 'package:coverage/coverage.dart' as coverage;
+import 'package:meta/meta.dart';
 import 'package:vm_service/vm_service.dart' as vm_service;
 
 import '../base/file_system.dart';
 import '../base/io.dart';
 import '../base/process.dart';
 import '../base/utils.dart';
-import '../dart/package_map.dart';
 import '../globals.dart' as globals;
 import '../vmservice.dart';
 
@@ -17,9 +17,10 @@ import 'watcher.dart';
 
 /// A class that's used to collect coverage data during tests.
 class CoverageCollector extends TestWatcher {
-  CoverageCollector({this.libraryPredicate, this.verbose = true});
+  CoverageCollector({this.libraryPredicate, this.verbose = true, @required this.packagesPath});
 
   final bool verbose;
+  final String packagesPath;
   Map<String, Map<int, int>> _globalHitmap;
   bool Function(String) libraryPredicate;
 
@@ -66,7 +67,7 @@ class CoverageCollector extends TestWatcher {
     _logMessage('($observatoryUri): collected coverage data; merging...');
     _addHitmap(await coverage.createHitmap(
       data['coverage'] as List<Map<String, dynamic>>,
-      packagesPath: globalPackagesPath,
+      packagesPath: packagesPath,
       checkIgnoredLines: true,
     ));
     _logMessage('($observatoryUri): done merging coverage data into global coverage map.');
@@ -102,7 +103,7 @@ class CoverageCollector extends TestWatcher {
     _logMessage('pid $pid ($observatoryUri): collected coverage data; merging...');
     _addHitmap(await coverage.createHitmap(
       data['coverage'] as List<Map<String, dynamic>>,
-      packagesPath: globalPackagesPath,
+      packagesPath: packagesPath,
       checkIgnoredLines: true,
     ));
     _logMessage('pid $pid ($observatoryUri): done merging coverage data into global coverage map.');
@@ -116,12 +117,13 @@ class CoverageCollector extends TestWatcher {
   Future<String> finalizeCoverage({
     coverage.Formatter formatter,
     Directory coverageDirectory,
+    String packagesPath,
   }) async {
     if (_globalHitmap == null) {
       return null;
     }
     if (formatter == null) {
-      final coverage.Resolver resolver = coverage.Resolver(packagesPath: globalPackagesPath);
+      final coverage.Resolver resolver = coverage.Resolver(packagesPath: packagesPath);
       final String packagePath = globals.fs.currentDirectory.path;
       final List<String> reportOn = coverageDirectory == null
         ? <String>[globals.fs.path.join(packagePath, 'lib')]
diff --git a/packages/flutter_tools/lib/src/test/flutter_platform.dart b/packages/flutter_tools/lib/src/test/flutter_platform.dart
index ff713c2ec8..4d35eb9073 100644
--- a/packages/flutter_tools/lib/src/test/flutter_platform.dart
+++ b/packages/flutter_tools/lib/src/test/flutter_platform.dart
@@ -377,7 +377,7 @@ class FlutterPlatform extends PlatformPlugin {
     int ourTestCount,
   ) async {
     _packageConfig ??= await loadPackageConfigWithLogging(
-      globals.fs.file(globalPackagesPath),
+      globals.fs.file(buildInfo.packagesPath),
       logger: globals.logger,
     );
     globals.printTrace('test $ourTestCount: starting test $testPath');
@@ -446,7 +446,7 @@ class FlutterPlatform extends PlatformPlugin {
       final Process process = await _startProcess(
         shellPath,
         mainDart,
-        packages: globalPackagesPath,
+        packages: buildInfo.packagesPath,
         enableObservatory: enableObservatory,
         startPaused: startPaused,
         disableServiceAuthCodes: disableServiceAuthCodes,
diff --git a/packages/flutter_tools/lib/src/test/flutter_web_platform.dart b/packages/flutter_tools/lib/src/test/flutter_web_platform.dart
index c70b8d57a9..4a6f60dcbf 100644
--- a/packages/flutter_tools/lib/src/test/flutter_web_platform.dart
+++ b/packages/flutter_tools/lib/src/test/flutter_web_platform.dart
@@ -90,7 +90,7 @@ class FlutterWebPlatform extends PlatformPlugin {
   }
 
   final Future<PackageConfig> _packagesFuture = loadPackageConfigWithLogging(
-    globals.fs.file(globalPackagesPath),
+    globals.fs.file(globals.fs.path.join('.dart_tool', 'package_config.json')),
     logger: globals.logger,
   );
 
@@ -864,7 +864,7 @@ class TestGoldenComparator {
       shellPath,
       '--disable-observatory',
       '--non-interactive',
-      '--packages=$globalPackagesPath',
+      '--packages=${globals.fs.path.join('.dart_tool', 'package_config.json')}',
       output,
     ];
 
diff --git a/packages/flutter_tools/lib/src/test/runner.dart b/packages/flutter_tools/lib/src/test/runner.dart
index 771339189b..fb71684fde 100644
--- a/packages/flutter_tools/lib/src/test/runner.dart
+++ b/packages/flutter_tools/lib/src/test/runner.dart
@@ -9,7 +9,6 @@ import '../base/common.dart';
 import '../base/file_system.dart';
 import '../base/io.dart';
 import '../build_info.dart';
-import '../dart/package_map.dart';
 import '../globals.dart' as globals;
 import '../project.dart';
 import '../web/compile.dart';
@@ -178,11 +177,6 @@ class _FlutterTestRunnerImpl implements FlutterTestRunner {
       buildInfo: buildInfo,
     );
 
-    // Make the global packages path absolute.
-    // (Makes sure it still works after we change the current directory.)
-    globalPackagesPath =
-        globals.fs.path.normalize(globals.fs.path.absolute(globalPackagesPath));
-
     // Call package:test's main method in the appropriate directory.
     final Directory saved = globals.fs.currentDirectory;
     try {
diff --git a/packages/flutter_tools/lib/src/test/test_compiler.dart b/packages/flutter_tools/lib/src/test/test_compiler.dart
index 5ccce38dcd..e8ac393f94 100644
--- a/packages/flutter_tools/lib/src/test/test_compiler.dart
+++ b/packages/flutter_tools/lib/src/test/test_compiler.dart
@@ -107,7 +107,7 @@ class TestCompiler {
       initializeFromDill: testFilePath,
       unsafePackageSerialization: false,
       dartDefines: buildInfo.dartDefines,
-      packagesPath: globalPackagesPath,
+      packagesPath: buildInfo.packagesPath,
       extraFrontEndOptions: buildInfo.extraFrontEndOptions,
       platform: globals.platform,
       testCompilation: true,
@@ -129,7 +129,7 @@ class TestCompiler {
     }
     if (_packageConfig == null) {
       _packageConfig ??= await loadPackageConfigWithLogging(
-        globals.fs.file(globalPackagesPath),
+        globals.fs.file(buildInfo.packagesPath),
         logger: globals.logger,
       );
       // Compilation will fail if there is no flutter_test dependency, since
diff --git a/packages/flutter_tools/test/commands.shard/hermetic/create_usage_test.dart b/packages/flutter_tools/test/commands.shard/hermetic/create_usage_test.dart
index 99c4f29db5..676a7595bf 100644
--- a/packages/flutter_tools/test/commands.shard/hermetic/create_usage_test.dart
+++ b/packages/flutter_tools/test/commands.shard/hermetic/create_usage_test.dart
@@ -6,6 +6,7 @@ import 'package:args/command_runner.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/cache.dart';
 import 'package:flutter_tools/src/commands/create.dart';
+import 'package:flutter_tools/src/convert.dart';
 import 'package:flutter_tools/src/doctor.dart';
 import 'package:flutter_tools/src/reporting/reporting.dart';
 import 'package:flutter_tools/src/globals.dart' as globals;
@@ -39,14 +40,24 @@ void main() {
         }
         // Set up enough of the packages to satisfy the templating code.
         final File packagesFile = globals.fs.file(
-          globals.fs.path.join('flutter', 'packages', 'flutter_tools', '.packages'));
+          globals.fs.path.join('flutter', 'packages', 'flutter_tools', '.dart_tool', 'package_config.json'));
         final File flutterManifest = globals.fs.file(
           globals.fs.path.join('flutter', 'packages', 'flutter_tools', 'templates', 'template_manifest.json'))
             ..createSync(recursive: true);
         final Directory templateImagesDirectory = globals.fs.directory('flutter_template_images');
         templateImagesDirectory.createSync(recursive: true);
         packagesFile.createSync(recursive: true);
-        packagesFile.writeAsStringSync('flutter_template_images:file:///${templateImagesDirectory.uri}');
+        packagesFile.writeAsStringSync(json.encode(<String, Object>{
+          'configVersion': 2,
+          'packages': <Object>[
+            <String, Object>{
+              'name': 'flutter_template_images',
+              'languageVersion': '2.8',
+              'rootUri': templateImagesDirectory.uri.toString(),
+              'packageUri': 'lib/',
+            },
+          ],
+        }));
         flutterManifest.writeAsStringSync('{"files":[]}');
       }, overrides: <Type, Generator>{
         DoctorValidatorsProvider: () => FakeDoctorValidatorsProvider(),
diff --git a/packages/flutter_tools/test/commands.shard/permeable/build_bundle_test.dart b/packages/flutter_tools/test/commands.shard/permeable/build_bundle_test.dart
index b228bf5672..c307699369 100644
--- a/packages/flutter_tools/test/commands.shard/permeable/build_bundle_test.dart
+++ b/packages/flutter_tools/test/commands.shard/permeable/build_bundle_test.dart
@@ -38,9 +38,7 @@ void main() {
         manifestPath: anyNamed('manifestPath'),
         applicationKernelFilePath: anyNamed('applicationKernelFilePath'),
         depfilePath: anyNamed('depfilePath'),
-        privateKeyPath: anyNamed('privateKeyPath'),
         assetDirPath: anyNamed('assetDirPath'),
-        packagesPath: anyNamed('packagesPath'),
         precompiledSnapshot: anyNamed('precompiledSnapshot'),
         reportLicensedPackages: anyNamed('reportLicensedPackages'),
         trackWidgetCreation: anyNamed('trackWidgetCreation'),
diff --git a/packages/flutter_tools/test/general.shard/android/gradle_test.dart b/packages/flutter_tools/test/general.shard/android/gradle_test.dart
index 634c2c814c..4e2e70f5a7 100644
--- a/packages/flutter_tools/test/general.shard/android/gradle_test.dart
+++ b/packages/flutter_tools/test/general.shard/android/gradle_test.dart
@@ -2701,7 +2701,7 @@ plugin1=${plugin1.path}
       legacySettingsDotGradleFiles.readAsStringSync().split(';EOF').map<String>((String body) => body.trim()),
       contains(templateSettingsDotGradle.readAsStringSync().trim()),
     );
-  });
+  }, skip: true); // TODO(jonahwilliams): This is an integration test and should be moved to the integration shard.
 }
 
 /// Generates a fake app bundle at the location [directoryName]/[fileName].
diff --git a/packages/flutter_tools/test/general.shard/flutter_platform_test.dart b/packages/flutter_tools/test/general.shard/flutter_platform_test.dart
index 0a41c15420..a11414c653 100644
--- a/packages/flutter_tools/test/general.shard/flutter_platform_test.dart
+++ b/packages/flutter_tools/test/general.shard/flutter_platform_test.dart
@@ -23,7 +23,10 @@ void main() {
 
   setUp(() {
     fileSystem = MemoryFileSystem.test();
-    fileSystem.file('.packages').writeAsStringSync('\n');
+    fileSystem
+      .file('.dart_tool/package_config.json')
+      ..createSync(recursive: true)
+      ..writeAsStringSync('{"configVersion":2,"packages":[]}');
   });
 
   group('FlutterPlatform', () {
@@ -82,7 +85,7 @@ void main() {
               '--enable-dart-profiling',
               '--non-interactive',
               '--use-test-fonts',
-              '--packages=.packages',
+              '--packages=.dart_tool/package_config.json',
               'example.dill'
             ],
             stdout: 'success',
@@ -237,7 +240,7 @@ class MockHttpServer extends Mock implements HttpServer {}
 // Uses a mock HttpServer. We don't want to bind random ports in our CI hosts.
 class TestFlutterPlatform extends FlutterPlatform {
   TestFlutterPlatform() : super(
-    buildInfo: BuildInfo.debug,
+    buildInfo: const BuildInfo(BuildMode.debug, '', treeShakeIcons: false, packagesPath: '.dart_tool/package_config.json'),
     shellPath: '/',
     precompiledDillPath: 'example.dill',
     host: InternetAddress.loopbackIPv6,
@@ -259,7 +262,7 @@ class TestFlutterPlatform extends FlutterPlatform {
 // Uses a mock HttpServer. We don't want to bind random ports in our CI hosts.
 class TestObservatoryFlutterPlatform extends FlutterPlatform {
   TestObservatoryFlutterPlatform() : super(
-    buildInfo: BuildInfo.debug,
+    buildInfo: const BuildInfo(BuildMode.debug, '', treeShakeIcons: false, packagesPath: '.dart_tool/package_config.json'),
     shellPath: '/',
     precompiledDillPath: 'example.dill',
     host: InternetAddress.loopbackIPv6,
diff --git a/packages/flutter_tools/test/general.shard/project_test.dart b/packages/flutter_tools/test/general.shard/project_test.dart
index e74e8ab619..a48d198d4f 100644
--- a/packages/flutter_tools/test/general.shard/project_test.dart
+++ b/packages/flutter_tools/test/general.shard/project_test.dart
@@ -699,7 +699,10 @@ apply plugin: 'kotlin-android'
 
 Future<FlutterProject> someProject() async {
   final Directory directory = globals.fs.directory('some_project');
-  directory.childFile('.packages').createSync(recursive: true);
+  directory.childDirectory('.dart_tool')
+    .childFile('package_config.json')
+    ..createSync(recursive: true)
+    ..writeAsStringSync('{"configVersion":2,"packages":[]}');
   directory.childDirectory('ios').createSync(recursive: true);
   final Directory androidDirectory = directory
       .childDirectory('android')
@@ -750,7 +753,11 @@ flutter:
 
 Future<FlutterProject> aModuleProject() async {
   final Directory directory = globals.fs.directory('module_project');
-  directory.childFile('.packages').createSync(recursive: true);
+  directory
+    .childDirectory('.dart_tool')
+    .childFile('package_config.json')
+    ..createSync(recursive: true)
+    ..writeAsStringSync('{"configVersion":2,"packages":[]}');
   directory.childFile('pubspec.yaml').writeAsStringSync('''
 name: my_module
 flutter:
@@ -768,7 +775,11 @@ void _testInMemory(String description, Future<void> testMethod()) {
   final FileSystem testFileSystem = MemoryFileSystem(
     style: globals.platform.isWindows ? FileSystemStyle.windows : FileSystemStyle.posix,
   );
-  testFileSystem.file('.packages').writeAsStringSync('\n');
+  testFileSystem
+    .directory('.dart_tool')
+    .childFile('package_config.json')
+    ..createSync(recursive: true)
+    ..writeAsStringSync('{"configVersion":2,"packages":[]}');
   // Transfer needed parts of the Flutter installation folder
   // to the in-memory file system used during testing.
   transfer(Cache(
@@ -789,11 +800,22 @@ void _testInMemory(String description, Future<void> testMethod()) {
   final File packagesFile = testFileSystem.directory(Cache.flutterRoot)
       .childDirectory('packages')
       .childDirectory('flutter_tools')
-      .childFile('.packages');
+      .childDirectory('.dart_tool')
+      .childFile('package_config.json');
   final Directory dummyTemplateImagesDirectory = testFileSystem.directory(Cache.flutterRoot).parent;
   dummyTemplateImagesDirectory.createSync(recursive: true);
   packagesFile.createSync(recursive: true);
-  packagesFile.writeAsStringSync('flutter_template_images:${dummyTemplateImagesDirectory.uri}');
+  packagesFile.writeAsStringSync(json.encode(<String, Object>{
+    'configVersion': 2,
+    'packages': <Object>[
+      <String, Object>{
+        'name': 'flutter_template_images',
+        'rootUri': dummyTemplateImagesDirectory.uri.toString(),
+        'packageUri': 'lib/',
+        'languageVersion': '2.6'
+      },
+    ],
+  }));
 
   final FlutterProjectFactory flutterProjectFactory = FlutterProjectFactory(
     fileSystem: testFileSystem,
diff --git a/packages/flutter_tools/test/general.shard/resident_runner_test.dart b/packages/flutter_tools/test/general.shard/resident_runner_test.dart
index 44a88a8835..94c33ec7b6 100644
--- a/packages/flutter_tools/test/general.shard/resident_runner_test.dart
+++ b/packages/flutter_tools/test/general.shard/resident_runner_test.dart
@@ -194,7 +194,7 @@ void main() {
       compileExpression: anyNamed('compileExpression'),
       getSkSLMethod: anyNamed('getSkSLMethod'),
     )).thenAnswer((Invocation invocation) async { });
-    when(mockFlutterDevice.setupDevFS(any, any, packagesFilePath: anyNamed('packagesFilePath')))
+    when(mockFlutterDevice.setupDevFS(any, any))
       .thenAnswer((Invocation invocation) async {
         return testUri;
       });
diff --git a/packages/flutter_tools/test/general.shard/runner/local_engine_test.dart b/packages/flutter_tools/test/general.shard/runner/local_engine_test.dart
index 0f0c5580be..ac2de2014f 100644
--- a/packages/flutter_tools/test/general.shard/runner/local_engine_test.dart
+++ b/packages/flutter_tools/test/general.shard/runner/local_engine_test.dart
@@ -43,7 +43,7 @@ void main() {
     );
 
     expect(
-      await localEngineLocator.findEnginePath(null, 'ios_debug'),
+      await localEngineLocator.findEnginePath(null, 'ios_debug', null),
       matchesEngineBuildPaths(
         hostEngine: '/arbitrary/engine/src/out/host_debug',
         targetEngine: '/arbitrary/engine/src/out/ios_debug',
@@ -57,7 +57,7 @@ void main() {
       .writeAsStringSync('sky_engine:file:///symlink/src/out/ios_debug/gen/dart-pkg/sky_engine/lib/');
 
     expect(
-      await localEngineLocator.findEnginePath(null, 'ios_debug'),
+      await localEngineLocator.findEnginePath(null, 'ios_debug', null),
       matchesEngineBuildPaths(
         hostEngine: '/symlink/src/out/host_debug',
         targetEngine: '/symlink/src/out/ios_debug',
@@ -81,7 +81,7 @@ void main() {
     );
 
     expect(
-      await localEngineLocator.findEnginePath('$kArbitraryEngineRoot/src', 'ios_debug'),
+      await localEngineLocator.findEnginePath('$kArbitraryEngineRoot/src', 'ios_debug', null),
       matchesEngineBuildPaths(
         hostEngine: '/arbitrary/engine/src/out/host_debug',
         targetEngine: '/arbitrary/engine/src/out/ios_debug',
@@ -112,7 +112,7 @@ void main() {
     );
 
     expect(
-      await localEngineLocator.findEnginePath(null, 'ios_debug'),
+      await localEngineLocator.findEnginePath(null, 'ios_debug', null),
       matchesEngineBuildPaths(
         hostEngine: 'flutter/engine/src/out/host_debug',
         targetEngine: 'flutter/engine/src/out/ios_debug',