diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2707d20..c3dd179 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,10 +1,14 @@
+## 1.0.7
+
+* Use conditional imports to avoid `dart:isolate` imports on the web.
+
 ## 1.0.6
 
 * Support package:http version `0.12.x`.
 
 ## 1.0.5
 
-* Use conditional imports to avoid dart:io imports on the web.
+* Use conditional imports to avoid `dart:io` imports on the web.
 
 ## 1.0.4
 
diff --git a/lib/src/current_isolate_resolver.dart b/lib/src/current_isolate_resolver.dart
index 22d9fbf..63bf716 100644
--- a/lib/src/current_isolate_resolver.dart
+++ b/lib/src/current_isolate_resolver.dart
@@ -14,7 +14,9 @@
 import 'utils.dart';
 
 /// The package resolution strategy used by the current isolate.
-class CurrentIsolateResolver implements PackageResolver {
+PackageResolver currentIsolateResolver() => _CurrentIsolateResolver();
+
+class _CurrentIsolateResolver implements PackageResolver {
   Future<Map<String, Uri>> get packageConfigMap async {
     if (_packageConfigMap != null) return _packageConfigMap;
 
diff --git a/lib/src/current_isolate_resolver_stub.dart b/lib/src/current_isolate_resolver_stub.dart
new file mode 100644
index 0000000..110701d
--- /dev/null
+++ b/lib/src/current_isolate_resolver_stub.dart
@@ -0,0 +1,8 @@
+// Copyright (c) 2019, 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.
+
+import 'package_resolver.dart';
+
+PackageResolver currentIsolateResolver() =>
+    throw UnsupportedError('No current isolate support on this platform');
diff --git a/lib/src/package_resolver.dart b/lib/src/package_resolver.dart
index c72fc9d..35097a2 100644
--- a/lib/src/package_resolver.dart
+++ b/lib/src/package_resolver.dart
@@ -6,11 +6,15 @@
 
 import 'package:http/http.dart' as http;
 
-import 'current_isolate_resolver.dart';
 import 'package_config_resolver.dart';
 import 'package_root_resolver.dart';
 import 'sync_package_resolver.dart';
 
+// ignore: uri_does_not_exist
+import 'current_isolate_resolver_stub.dart'
+    // ignore: uri_does_not_exist
+    if (dart.library.isolate) 'current_isolate_resolver.dart' as isolate;
+
 /// A class that defines how to resolve `package:` URIs.
 ///
 /// This includes the information necessary to resolve `package:` URIs using
@@ -81,7 +85,7 @@
 
   /// Returns package resolution strategy describing how the current isolate
   /// resolves `package:` URIs.
-  static final PackageResolver current = new CurrentIsolateResolver();
+  static final PackageResolver current = isolate.currentIsolateResolver();
 
   /// Returns a package resolution strategy that is unable to resolve any
   /// `package:` URIs.
diff --git a/lib/src/utils.dart b/lib/src/utils.dart
index 5e4b411..2becf22 100644
--- a/lib/src/utils.dart
+++ b/lib/src/utils.dart
@@ -2,19 +2,20 @@
 // 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.
 
-// TODO(nweiz): Avoid importing dart:io directly when cross-platform libraries
-// exist.
 import 'dart:async';
 import 'dart:convert';
-import 'dart:isolate';
 
 import 'package:http/http.dart' as http;
 import 'package:package_config/packages_file.dart' as packages_file;
 
 // ignore: uri_does_not_exist
-import 'utils_stub.dart'
+import 'utils_io_stub.dart'
     // ignore: uri_does_not_exist
-    if (dart.library.io) 'utils_io.dart' as conditional;
+    if (dart.library.io) 'utils_io.dart' as io;
+// ignore: uri_does_not_exist
+import 'utils_isolate_stub.dart'
+    // ignore: uri_does_not_exist
+    if (dart.library.isolate) 'utils_isolate.dart' as isolate;
 
 /// Loads the configuration map from [uri].
 ///
@@ -28,11 +29,11 @@
   if (resolved.scheme == 'http') {
     text = await (client == null ? http.read(resolved) : client.read(resolved));
   } else if (resolved.scheme == 'file') {
-    text = await conditional.readFileAsString(resolved);
+    text = await io.readFileAsString(resolved);
   } else if (resolved.scheme == 'data') {
     text = resolved.data.contentAsString();
   } else if (resolved.scheme == 'package') {
-    return loadConfigMap(await Isolate.resolvePackageUri(uri), client: client);
+    return loadConfigMap(await isolate.resolvePackageUri(uri), client: client);
   } else {
     throw new UnsupportedError(
         'PackageInfo.loadConfig doesn\'t support URI scheme "${uri.scheme}:".');
@@ -83,4 +84,4 @@
 }
 
 String packagePathForRoot(String package, Uri root) =>
-    conditional.packagePathForRoot(package, root);
+    io.packagePathForRoot(package, root);
diff --git a/lib/src/utils_io_stub.dart b/lib/src/utils_io_stub.dart
new file mode 100644
index 0000000..cefa097
--- /dev/null
+++ b/lib/src/utils_io_stub.dart
@@ -0,0 +1,12 @@
+// Copyright (c) 2018, 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.
+
+import 'dart:async';
+
+Future<String> readFileAsString(Uri uri) => throw UnsupportedError(
+    'Reading files is only supported where dart:io is available.');
+
+String packagePathForRoot(String package, Uri root) => throw UnsupportedError(
+    'Computing package paths from a root is only supported where dart:io is '
+    'available.');
diff --git a/lib/src/utils_isolate.dart b/lib/src/utils_isolate.dart
new file mode 100644
index 0000000..a58c4db
--- /dev/null
+++ b/lib/src/utils_isolate.dart
@@ -0,0 +1,8 @@
+// Copyright (c) 2019, 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.
+
+import 'dart:isolate';
+
+Future<Uri> resolvePackageUri(Uri packageUri) =>
+    Isolate.resolvePackageUri(packageUri);
diff --git a/lib/src/utils_isolate_stub.dart b/lib/src/utils_isolate_stub.dart
new file mode 100644
index 0000000..4639b97
--- /dev/null
+++ b/lib/src/utils_isolate_stub.dart
@@ -0,0 +1,6 @@
+// Copyright (c) 2019, 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.
+
+Future<Uri> resolvePackageUri(Uri packageUri) =>
+    throw UnsupportedError('May not use a package URI');
diff --git a/pubspec.yaml b/pubspec.yaml
index 35d42c6..ebf36e7 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: package_resolver
-version: 1.0.6
+version: 1.0.7
 
 description: First-class package resolution strategy classes.
 author: Dart Team <misc@dartlang.org>