diff --git a/pkg/analysis_server/test/services/search/search_engine_test.dart b/pkg/analysis_server/test/services/search/search_engine_test.dart
index c46b81f7aec..b09dfac42b9 100644
--- a/pkg/analysis_server/test/services/search/search_engine_test.dart
+++ b/pkg/analysis_server/test/services/search/search_engine_test.dart
@@ -7,6 +7,7 @@ import 'dart:async';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analysis_server/src/services/search/search_engine_internal.dart';
 import 'package:analyzer/dart/element/element.dart';
+import 'package:analyzer/src/context/packages.dart';
 import 'package:analyzer/src/dart/analysis/byte_store.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
 import 'package:analyzer/src/dart/analysis/file_state.dart';
@@ -489,7 +490,7 @@ class B extends A {}
 
     return AnalysisDriver(scheduler, logger, resourceProvider, byteStore,
         contentOverlay, null, SourceFactory(resolvers), AnalysisOptionsImpl(),
-        enableIndex: true);
+        packages: Packages.empty, enableIndex: true);
   }
 
   static void _assertContainsClass(Set<ClassElement> subtypes, String name) {
diff --git a/pkg/analyzer/lib/src/context/builder.dart b/pkg/analyzer/lib/src/context/builder.dart
index 70d6aa7df0d..5038e0fca3a 100644
--- a/pkg/analyzer/lib/src/context/builder.dart
+++ b/pkg/analyzer/lib/src/context/builder.dart
@@ -129,6 +129,7 @@ class ContextBuilder {
         contextRoot,
         sf,
         options,
+        packages: createPackageMap(path),
         enableIndex: enableIndex,
         externalSummaries: summaryData);
 
diff --git a/pkg/analyzer/lib/src/dart/analysis/driver.dart b/pkg/analyzer/lib/src/dart/analysis/driver.dart
index a889a250400..7ea2d29ae31 100644
--- a/pkg/analyzer/lib/src/dart/analysis/driver.dart
+++ b/pkg/analyzer/lib/src/dart/analysis/driver.dart
@@ -17,6 +17,7 @@ import 'package:analyzer/error/listener.dart';
 import 'package:analyzer/exception/exception.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/context/context_root.dart';
+import 'package:analyzer/src/context/packages.dart';
 import 'package:analyzer/src/dart/analysis/byte_store.dart';
 import 'package:analyzer/src/dart/analysis/feature_set_provider.dart';
 import 'package:analyzer/src/dart/analysis/file_state.dart';
@@ -131,6 +132,9 @@ class AnalysisDriver implements AnalysisDriverGeneric {
   /// The analysis options to analyze with.
   AnalysisOptionsImpl _analysisOptions;
 
+  /// The [Packages] object with packages and their language versions.
+  Packages _packages;
+
   /// The [SourceFactory] is used to resolve URIs to paths and restore URIs
   /// from file paths.
   SourceFactory _sourceFactory;
@@ -286,11 +290,13 @@ class AnalysisDriver implements AnalysisDriverGeneric {
       this.contextRoot,
       SourceFactory sourceFactory,
       this._analysisOptions,
-      {this.disableChangesAndCacheAllResults = false,
+      {@required Packages packages,
+      this.disableChangesAndCacheAllResults = false,
       this.enableIndex = false,
       SummaryDataStore externalSummaries,
       bool retainDataForTesting = false})
       : _logger = logger,
+        _packages = packages ?? Packages.empty,
         _sourceFactory = sourceFactory,
         _externalSummaries = externalSummaries,
         testingData = retainDataForTesting ? TestingData() : null {
@@ -488,11 +494,17 @@ class AnalysisDriver implements AnalysisDriverGeneric {
   ///
   /// At least one of the optional parameters should be provided, but only those
   /// that represent state that has actually changed need be provided.
-  void configure(
-      {AnalysisOptions analysisOptions, SourceFactory sourceFactory}) {
+  void configure({
+    AnalysisOptions analysisOptions,
+    Packages packages,
+    SourceFactory sourceFactory,
+  }) {
     if (analysisOptions != null) {
       _analysisOptions = analysisOptions;
     }
+    if (packages != null) {
+      _packages = packages;
+    }
     if (sourceFactory != null) {
       _sourceFactory = sourceFactory;
     }
@@ -1460,7 +1472,7 @@ class AnalysisDriver implements AnalysisDriverGeneric {
 
     var featureSetProvider = FeatureSetProvider.build(
       resourceProvider: resourceProvider,
-      contextRoot: contextRoot,
+      packages: _packages,
       sourceFactory: _sourceFactory,
       defaultFeatureSet: _analysisOptions.contextFeatures,
     );
diff --git a/pkg/analyzer/lib/src/dart/analysis/feature_set_provider.dart b/pkg/analyzer/lib/src/dart/analysis/feature_set_provider.dart
index 2f7abdfe530..0bbaee58216 100644
--- a/pkg/analyzer/lib/src/dart/analysis/feature_set_provider.dart
+++ b/pkg/analyzer/lib/src/dart/analysis/feature_set_provider.dart
@@ -4,7 +4,6 @@
 
 import 'package:analyzer/dart/analysis/features.dart';
 import 'package:analyzer/file_system/file_system.dart';
-import 'package:analyzer/src/context/context_root.dart';
 import 'package:analyzer/src/context/packages.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:meta/meta.dart';
@@ -51,7 +50,7 @@ class FeatureSetProvider {
 
   static FeatureSetProvider build({
     @required ResourceProvider resourceProvider,
-    @required ContextRoot contextRoot,
+    @required Packages packages,
     @required SourceFactory sourceFactory,
     @required FeatureSet defaultFeatureSet,
   }) {
@@ -61,8 +60,6 @@ class FeatureSetProvider {
       defaultFeatureSet,
     );
 
-    var packages = _findPackages(resourceProvider, contextRoot);
-
     return FeatureSetProvider._(
       sdkFeatureSet: sdkFeatureSet,
       packages: packages,
@@ -97,16 +94,4 @@ class FeatureSetProvider {
 
     return defaultFeatureSet;
   }
-
-  static Packages _findPackages(
-    ResourceProvider resourceProvider,
-    ContextRoot contextRoot,
-  ) {
-    if (contextRoot == null) {
-      return Packages(const {});
-    }
-
-    var rootFolder = resourceProvider.getFolder(contextRoot.root);
-    return findPackagesFrom(resourceProvider, rootFolder);
-  }
 }
diff --git a/pkg/analyzer/lib/src/lint/analysis.dart b/pkg/analyzer/lib/src/lint/analysis.dart
index a5d61ba05a9..49536c714bd 100644
--- a/pkg/analyzer/lib/src/lint/analysis.dart
+++ b/pkg/analyzer/lib/src/lint/analysis.dart
@@ -175,14 +175,16 @@ class LintDriver {
     PerformanceLog log = PerformanceLog(null);
     AnalysisDriverScheduler scheduler = AnalysisDriverScheduler(log);
     AnalysisDriver analysisDriver = AnalysisDriver(
-        scheduler,
-        log,
-        resourceProvider,
-        MemoryByteStore(),
-        FileContentOverlay(),
-        null,
-        sourceFactory,
-        _buildAnalyzerOptions(options));
+      scheduler,
+      log,
+      resourceProvider,
+      MemoryByteStore(),
+      FileContentOverlay(),
+      null,
+      sourceFactory,
+      _buildAnalyzerOptions(options),
+      packages: Packages.empty,
+    );
     analysisDriver.results.listen((_) {});
     analysisDriver.exceptions.listen((_) {});
     scheduler.start();
diff --git a/pkg/analyzer/test/generated/resolver_test_case.dart b/pkg/analyzer/test/generated/resolver_test_case.dart
index 86950e94da5..0575378b706 100644
--- a/pkg/analyzer/test/generated/resolver_test_case.dart
+++ b/pkg/analyzer/test/generated/resolver_test_case.dart
@@ -13,6 +13,7 @@ import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/dart/element/type_provider.dart';
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/file_system/file_system.dart';
+import 'package:analyzer/src/context/packages.dart';
 import 'package:analyzer/src/dart/analysis/byte_store.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
 import 'package:analyzer/src/dart/analysis/file_state.dart';
@@ -600,7 +601,8 @@ class ResolverTestCase with ResourceProviderMixin {
     PerformanceLog log = PerformanceLog(_logBuffer);
     AnalysisDriverScheduler scheduler = AnalysisDriverScheduler(log);
     driver = AnalysisDriver(scheduler, log, resourceProvider, MemoryByteStore(),
-        fileContentOverlay, null, sourceFactory, options);
+        fileContentOverlay, null, sourceFactory, options,
+        packages: Packages.empty);
     scheduler.start();
   }
 
diff --git a/pkg/analyzer/test/src/dart/analysis/base.dart b/pkg/analyzer/test/src/dart/analysis/base.dart
index d1cebbcc7a9..4d2361c16e7 100644
--- a/pkg/analyzer/test/src/dart/analysis/base.dart
+++ b/pkg/analyzer/test/src/dart/analysis/base.dart
@@ -6,6 +6,7 @@ import 'package:analyzer/dart/analysis/results.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/visitor.dart';
 import 'package:analyzer/file_system/file_system.dart';
+import 'package:analyzer/src/context/packages.dart';
 import 'package:analyzer/src/dart/analysis/byte_store.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
 import 'package:analyzer/src/dart/analysis/file_state.dart';
@@ -99,6 +100,7 @@ class BaseAnalysisDriverTest with ResourceProviderMixin {
           ResourceUriResolver(resourceProvider)
         ]),
         createAnalysisOptions(),
+        packages: Packages.empty,
         disableChangesAndCacheAllResults: disableChangesAndCacheAllResults,
         enableIndex: true,
         externalSummaries: externalSummaries);
diff --git a/pkg/analyzer/test/src/dart/analysis/driver_test.dart b/pkg/analyzer/test/src/dart/analysis/driver_test.dart
index a7f4feee98b..789a977da4b 100644
--- a/pkg/analyzer/test/src/dart/analysis/driver_test.dart
+++ b/pkg/analyzer/test/src/dart/analysis/driver_test.dart
@@ -9,6 +9,7 @@ import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/error/error.dart';
+import 'package:analyzer/src/context/packages.dart';
 import 'package:analyzer/src/dart/analysis/byte_store.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
 import 'package:analyzer/src/dart/analysis/file_state.dart';
@@ -78,7 +79,8 @@ class AnalysisDriverSchedulerTest with ResourceProviderMixin {
         SourceFactory(
           [DartUriResolver(sdk), ResourceUriResolver(resourceProvider)],
         ),
-        AnalysisOptionsImpl());
+        AnalysisOptionsImpl(),
+        packages: Packages.empty);
     driver.results.forEach(allResults.add);
     return driver;
   }
diff --git a/pkg/analyzer/test/src/dart/analysis/feature_set_provider_test.dart b/pkg/analyzer/test/src/dart/analysis/feature_set_provider_test.dart
index d5a39b6e6fb..a1746fa9c1f 100644
--- a/pkg/analyzer/test/src/dart/analysis/feature_set_provider_test.dart
+++ b/pkg/analyzer/test/src/dart/analysis/feature_set_provider_test.dart
@@ -4,7 +4,6 @@
 
 import 'package:analyzer/dart/analysis/features.dart';
 import 'package:analyzer/file_system/file_system.dart';
-import 'package:analyzer/src/context/context_root.dart';
 import 'package:analyzer/src/context/packages.dart';
 import 'package:analyzer/src/context/source.dart';
 import 'package:analyzer/src/dart/analysis/feature_set_provider.dart';
@@ -128,11 +127,7 @@ test:lib/
   void _buildProvider(List<String> enabledExperiments) {
     provider = FeatureSetProvider.build(
       resourceProvider: resourceProvider,
-      contextRoot: ContextRoot(
-        convertPath('/test'),
-        [],
-        pathContext: resourceProvider.pathContext,
-      ),
+      packages: findPackagesFrom(resourceProvider, getFolder('/test')),
       sourceFactory: sourceFactory,
       defaultFeatureSet: FeatureSet.fromEnableFlags(enabledExperiments),
     );
diff --git a/pkg/analyzer/test/src/dart/analysis/file_state_test.dart b/pkg/analyzer/test/src/dart/analysis/file_state_test.dart
index de5f084843e..079713add8b 100644
--- a/pkg/analyzer/test/src/dart/analysis/file_state_test.dart
+++ b/pkg/analyzer/test/src/dart/analysis/file_state_test.dart
@@ -8,6 +8,7 @@ import 'dart:typed_data';
 import 'package:analyzer/dart/analysis/declared_variables.dart';
 import 'package:analyzer/dart/analysis/features.dart';
 import 'package:analyzer/file_system/file_system.dart';
+import 'package:analyzer/src/context/packages.dart';
 import 'package:analyzer/src/dart/analysis/byte_store.dart';
 import 'package:analyzer/src/dart/analysis/feature_set_provider.dart';
 import 'package:analyzer/src/dart/analysis/file_state.dart';
@@ -61,7 +62,7 @@ class FileSystemStateTest with ResourceProviderMixin {
     AnalysisOptions analysisOptions = AnalysisOptionsImpl();
     var featureSetProvider = FeatureSetProvider.build(
       resourceProvider: resourceProvider,
-      contextRoot: null,
+      packages: Packages.empty,
       sourceFactory: sourceFactory,
       defaultFeatureSet: FeatureSet.fromEnableFlags([]),
     );
diff --git a/pkg/analyzer/test/src/dart/resolution/driver_resolution.dart b/pkg/analyzer/test/src/dart/resolution/driver_resolution.dart
index a55f39c7974..8e35b702ef3 100644
--- a/pkg/analyzer/test/src/dart/resolution/driver_resolution.dart
+++ b/pkg/analyzer/test/src/dart/resolution/driver_resolution.dart
@@ -7,6 +7,7 @@ import 'dart:async';
 import 'package:analyzer/dart/analysis/results.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/context/context_root.dart';
+import 'package:analyzer/src/context/packages.dart';
 import 'package:analyzer/src/dart/analysis/byte_store.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
 import 'package:analyzer/src/dart/analysis/file_state.dart';
@@ -75,7 +76,8 @@ class DriverResolutionTest with ResourceProviderMixin, ResolutionTest {
           PackageMapUriResolver(resourceProvider, packageMap),
           ResourceUriResolver(resourceProvider)
         ]),
-        analysisOptions);
+        analysisOptions,
+        packages: Packages.empty);
 
     scheduler.start();
   }
diff --git a/pkg/analyzer/test/src/dart/resolution/language_version_test.dart b/pkg/analyzer/test/src/dart/resolution/language_version_test.dart
index 88732aa2bd0..5e42d74be6c 100644
--- a/pkg/analyzer/test/src/dart/resolution/language_version_test.dart
+++ b/pkg/analyzer/test/src/dart/resolution/language_version_test.dart
@@ -2,6 +2,7 @@
 // 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.
 
+import 'package:analyzer/src/context/packages.dart';
 import 'package:analyzer/src/dart/analysis/experiments.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
@@ -42,7 +43,12 @@ class DefaultNonNullableTest extends DriverResolutionTest {
   ]
 }
 ''');
-    driver.configure();
+    driver.configure(
+      packages: findPackagesFrom(
+        resourceProvider,
+        getFolder('/test'),
+      ),
+    );
 
     newFile('/aaa/lib/a.dart', content: r'''
 int a = 0;
@@ -80,7 +86,12 @@ var z = PI;
   ]
 }
 ''');
-    driver.configure();
+    driver.configure(
+      packages: findPackagesFrom(
+        resourceProvider,
+        getFolder('/test'),
+      ),
+    );
 
     newFile('/aaa/lib/a.dart', content: r'''
 int a = 0;
diff --git a/pkg/analyzer/test/src/task/strong/strong_test_helper.dart b/pkg/analyzer/test/src/task/strong/strong_test_helper.dart
index 0e6fd9b2f61..5936f6bee26 100644
--- a/pkg/analyzer/test/src/task/strong/strong_test_helper.dart
+++ b/pkg/analyzer/test/src/task/strong/strong_test_helper.dart
@@ -13,6 +13,7 @@ import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/source/error_processor.dart';
+import 'package:analyzer/src/context/packages.dart';
 import 'package:analyzer/src/dart/analysis/byte_store.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
 import 'package:analyzer/src/dart/analysis/file_state.dart';
@@ -303,7 +304,8 @@ class AbstractStrongTest with ResourceProviderMixin {
         fileContentOverlay,
         null,
         sourceFactory,
-        analysisOptions);
+        analysisOptions,
+        packages: Packages.empty);
     scheduler.start();
 
     mainUnit = (await _driver.getResult(mainFile.path)).unit;
diff --git a/pkg/analyzer/test/util/id_testing_helper.dart b/pkg/analyzer/test/util/id_testing_helper.dart
index 5081ede9fa5..babb02e8a2a 100644
--- a/pkg/analyzer/test/util/id_testing_helper.dart
+++ b/pkg/analyzer/test/util/id_testing_helper.dart
@@ -16,6 +16,7 @@ import 'package:analyzer/diagnostic/diagnostic.dart';
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
+import 'package:analyzer/src/context/packages.dart';
 import 'package:analyzer/src/dart/analysis/byte_store.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
 import 'package:analyzer/src/dart/analysis/file_state.dart';
@@ -146,6 +147,7 @@ Future<TestResult<T>> runTestForConfig<T>(
         ResourceUriResolver(resourceProvider)
       ]),
       analysisOptions,
+      packages: Packages.empty,
       retainDataForTesting: true);
   scheduler.start();
   var result = await driver
diff --git a/pkg/analyzer_cli/lib/src/build_mode.dart b/pkg/analyzer_cli/lib/src/build_mode.dart
index 48d9d71f1aa..6ad947b2709 100644
--- a/pkg/analyzer_cli/lib/src/build_mode.dart
+++ b/pkg/analyzer_cli/lib/src/build_mode.dart
@@ -12,6 +12,7 @@ import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/context/context.dart';
+import 'package:analyzer/src/context/packages.dart';
 import 'package:analyzer/src/dart/analysis/byte_store.dart';
 import 'package:analyzer/src/dart/analysis/cache.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
@@ -422,6 +423,8 @@ class BuildMode with HasContextMixin {
       summaryDataStore.addBundle(null, sdkBundle);
     });
 
+    var packages = _findPackages(rootPath);
+
     sourceFactory = SourceFactory(<UriResolver>[
       DartUriResolver(sdk),
       TrackingInSummaryUriResolver(
@@ -435,15 +438,17 @@ class BuildMode with HasContextMixin {
 
     AnalysisDriverScheduler scheduler = AnalysisDriverScheduler(logger);
     analysisDriver = AnalysisDriver(
-        scheduler,
-        logger,
-        resourceProvider,
-        MemoryByteStore(),
-        FileContentOverlay(),
-        null,
-        sourceFactory,
-        analysisOptions,
-        externalSummaries: summaryDataStore);
+      scheduler,
+      logger,
+      resourceProvider,
+      MemoryByteStore(),
+      FileContentOverlay(),
+      null,
+      sourceFactory,
+      analysisOptions,
+      externalSummaries: summaryDataStore,
+      packages: packages,
+    );
 
     declaredVariables = DeclaredVariables.fromMap(options.definedVariables);
     analysisDriver.declaredVariables = declaredVariables;
@@ -494,6 +499,14 @@ class BuildMode with HasContextMixin {
     return uriToFileMap;
   }
 
+  Packages _findPackages(String path) {
+    if (path != null) {
+      return findPackagesFrom(resourceProvider, resourceProvider.getFile(path));
+    } else {
+      return Packages.empty;
+    }
+  }
+
   /// Ensure that the parsed unit for [absoluteUri] is available.
   ///
   /// If the unit is in the input [summaryDataStore], do nothing.
diff --git a/pkg/analyzer_cli/lib/src/driver.dart b/pkg/analyzer_cli/lib/src/driver.dart
index e92cb2c3535..9bbde0aecc2 100644
--- a/pkg/analyzer_cli/lib/src/driver.dart
+++ b/pkg/analyzer_cli/lib/src/driver.dart
@@ -581,7 +581,8 @@ class Driver with HasContextMixin implements CommandLineStarter {
         FileContentOverlay(),
         ContextRoot(source, [], pathContext: resourceProvider.pathContext),
         sourceFactory,
-        analysisOptions);
+        analysisOptions,
+        packages: packageInfo.packages);
     analysisDriver.results.listen((_) {});
     analysisDriver.exceptions.listen((_) {});
     scheduler.start();
diff --git a/pkg/analyzer_plugin/test/plugin/mocks.dart b/pkg/analyzer_plugin/test/plugin/mocks.dart
index ee54ad368e7..93409ded3d7 100644
--- a/pkg/analyzer_plugin/test/plugin/mocks.dart
+++ b/pkg/analyzer_plugin/test/plugin/mocks.dart
@@ -8,6 +8,7 @@ import 'dart:collection';
 import 'package:analyzer/dart/analysis/results.dart';
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/file_system/file_system.dart';
+import 'package:analyzer/src/context/packages.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
 import 'package:analyzer/src/dart/analysis/file_state.dart';
 import 'package:analyzer/src/generated/engine.dart'
@@ -34,7 +35,8 @@ class MockAnalysisDriver extends AnalysisDriver {
             FileContentOverlay(),
             null,
             SourceFactory([]),
-            AnalysisOptionsImpl());
+            AnalysisOptionsImpl(),
+            packages: Packages.empty);
 
   @override
   bool get hasFilesToAnalyze => false;