diff --git a/tests/FeatureSplit/feature1/Android.mk b/tests/FeatureSplit/feature1/Android.mk
index b3ea97b..e6ba5c2 100644
--- a/tests/FeatureSplit/feature1/Android.mk
+++ b/tests/FeatureSplit/feature1/Android.mk
@@ -26,6 +26,6 @@
 LOCAL_RES_LIBRARIES := FeatureSplitBase
 
 LOCAL_AAPT_FLAGS += --package-id 0x80
-LOCAL_AAPT_FLAGS += --rename-manifest-package com.android.test.split.feature
+LOCAL_AAPT_FLAGS += --custom-package com.android.test.split.feature.one
 
 include $(BUILD_PACKAGE)
diff --git a/tests/FeatureSplit/feature1/AndroidManifest.xml b/tests/FeatureSplit/feature1/AndroidManifest.xml
index 4e7d151..b87361f 100644
--- a/tests/FeatureSplit/feature1/AndroidManifest.xml
+++ b/tests/FeatureSplit/feature1/AndroidManifest.xml
@@ -15,13 +15,13 @@
 -->
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.android.test.split.feature.one"
+    package="com.android.test.split.feature"
     featureSplit="feature1">
 
     <uses-sdk android:minSdkVersion="21" />
 
     <application>
-        <activity android:name=".One" android:label="Feature One">
+        <activity android:name=".one.One" android:label="Feature One">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
diff --git a/tests/FeatureSplit/feature1/res/values/values.xml b/tests/FeatureSplit/feature1/res/values/values.xml
index 0e3e73c..7d58865 100644
--- a/tests/FeatureSplit/feature1/res/values/values.xml
+++ b/tests/FeatureSplit/feature1/res/values/values.xml
@@ -20,7 +20,7 @@
     <integer name="test_integer2">200</integer>
     <color name="test_color2">#00ff00</color>
     <string-array name="string_array2">
-        <item>@*com.android.test.split.feature:string/app_title</item>
+        <item>@string/app_title</item>
     </string-array>
 </resources>
 
diff --git a/tests/FeatureSplit/feature2/Android.mk b/tests/FeatureSplit/feature2/Android.mk
index e2fd903..c8e8609 100644
--- a/tests/FeatureSplit/feature2/Android.mk
+++ b/tests/FeatureSplit/feature2/Android.mk
@@ -26,6 +26,6 @@
 LOCAL_RES_LIBRARIES := FeatureSplitBase
 
 LOCAL_AAPT_FLAGS += --package-id 0x81
-LOCAL_AAPT_FLAGS += --rename-manifest-package com.android.test.split.feature
+LOCAL_AAPT_FLAGS += --custom-package com.android.test.split.feature.two
 
 include $(BUILD_PACKAGE)
diff --git a/tests/FeatureSplit/feature2/AndroidManifest.xml b/tests/FeatureSplit/feature2/AndroidManifest.xml
index bfe6f38..abd0b5e 100644
--- a/tests/FeatureSplit/feature2/AndroidManifest.xml
+++ b/tests/FeatureSplit/feature2/AndroidManifest.xml
@@ -15,7 +15,7 @@
 -->
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.android.test.split.feature.two"
+    package="com.android.test.split.feature"
     featureSplit="feature2">
 
     <uses-sdk android:minSdkVersion="21" />
diff --git a/tests/FeatureSplit/feature2/res/values/values.xml b/tests/FeatureSplit/feature2/res/values/values.xml
index 2fa6f90..af5ed1b 100644
--- a/tests/FeatureSplit/feature2/res/values/values.xml
+++ b/tests/FeatureSplit/feature2/res/values/values.xml
@@ -18,7 +18,7 @@
     <integer name="test_integer3">300</integer>
     <color name="test_color3">#0000ff</color>
     <string-array name="string_array3">
-        <item>@*com.android.test.split.feature:string/app_title</item>
+        <item>@string/app_title</item>
     </string-array>
 </resources>
 
diff --git a/tools/aapt2/ResourceValues.cpp b/tools/aapt2/ResourceValues.cpp
index b38d259..a782cd3 100644
--- a/tools/aapt2/ResourceValues.cpp
+++ b/tools/aapt2/ResourceValues.cpp
@@ -118,7 +118,7 @@
 bool Reference::Flatten(android::Res_value* out_value) const {
   const ResourceId resid = id.value_or_default(ResourceId(0));
   const bool dynamic = resid.is_valid_dynamic() && resid.package_id() != kFrameworkPackageId &&
-                       resid.package_id() != kAppPackageId;
+                       resid.package_id() < kAppPackageId;
 
   if (reference_type == Reference::Type::kResource) {
     if (dynamic) {
diff --git a/tools/aapt2/cmd/Link.cpp b/tools/aapt2/cmd/Link.cpp
index b372923..66b5a7a 100644
--- a/tools/aapt2/cmd/Link.cpp
+++ b/tools/aapt2/cmd/Link.cpp
@@ -795,6 +795,9 @@
     for (auto& entry : asset_source->GetAssignedPackageIds()) {
       if (entry.first > kFrameworkPackageId && entry.first < kAppPackageId) {
         final_table_.included_packages_[entry.first] = entry.second;
+      } else if (entry.first == kAppPackageId) {
+        // Capture the included base feature package.
+        included_feature_base_ = entry.second;
       }
     }
 
@@ -1465,11 +1468,48 @@
       return false;
     }
 
-    if (!FlattenTable(table, options_.output_format, writer)) {
-      context_->GetDiagnostics()->Error(DiagMessage() << "failed to write resource table");
-      return false;
+    // Hack to fix b/68820737.
+    // We need to modify the ResourceTable's package name, but that should NOT affect
+    // anything else being generated, which includes the Java classes.
+    // If required, the package name is modifed before flattening, and then modified back
+    // to its original name.
+    ResourceTablePackage* package_to_rewrite = nullptr;
+    if (context_->GetPackageId() > kAppPackageId &&
+        included_feature_base_ == make_value(context_->GetCompilationPackage())) {
+      // The base APK is included, and this is a feature split. If the base package is
+      // the same as this package, then we are building an old style Android Instant Apps feature
+      // split and must apply this workaround to avoid requiring namespaces support.
+      package_to_rewrite = table->FindPackage(context_->GetCompilationPackage());
+      if (package_to_rewrite != nullptr) {
+        CHECK_EQ(1u, table->packages.size()) << "can't change name of package when > 1 package";
+
+        std::string new_package_name =
+            StringPrintf("%s.%s", package_to_rewrite->name.c_str(),
+                         app_info_.split_name.value_or_default("feature").c_str());
+
+        if (context_->IsVerbose()) {
+          context_->GetDiagnostics()->Note(
+              DiagMessage() << "rewriting resource package name for feature split to '"
+                            << new_package_name << "'");
+        }
+        package_to_rewrite->name = new_package_name;
+      }
     }
-    return true;
+
+    bool success = FlattenTable(table, options_.output_format, writer);
+
+    if (package_to_rewrite != nullptr) {
+      // Change the name back.
+      package_to_rewrite->name = context_->GetCompilationPackage();
+      if (package_to_rewrite->id) {
+        table->included_packages_.erase(package_to_rewrite->id.value());
+      }
+    }
+
+    if (!success) {
+      context_->GetDiagnostics()->Error(DiagMessage() << "failed to write resource table");
+    }
+    return success;
   }
 
   int Run(const std::vector<std::string>& input_files) {
@@ -1498,8 +1538,8 @@
       return 1;
     }
 
-    const AppInfo& app_info = maybe_app_info.value();
-    context_->SetMinSdkVersion(app_info.min_sdk_version.value_or_default(0));
+    app_info_ = maybe_app_info.value();
+    context_->SetMinSdkVersion(app_info_.min_sdk_version.value_or_default(0));
 
     context_->SetNameManglerPolicy(NameManglerPolicy{context_->GetCompilationPackage()});
 
@@ -1699,7 +1739,7 @@
 
         // Generate an AndroidManifest.xml for each split.
         std::unique_ptr<xml::XmlResource> split_manifest =
-            GenerateSplitManifest(app_info, *split_constraints_iter);
+            GenerateSplitManifest(app_info_, *split_constraints_iter);
 
         XmlReferenceLinker linker;
         if (!linker.Consume(context_, split_manifest.get())) {
@@ -1799,6 +1839,8 @@
   LinkContext* context_;
   ResourceTable final_table_;
 
+  AppInfo app_info_;
+
   std::unique_ptr<TableMerger> table_merger_;
 
   // A pointer to the FileCollection representing the filesystem (not archives).
@@ -1816,6 +1858,9 @@
 
   // The set of shared libraries being used, mapping their assigned package ID to package name.
   std::map<size_t, std::string> shared_libs_;
+
+  // The package name of the base application, if it is included.
+  Maybe<std::string> included_feature_base_;
 };
 
 int Link(const std::vector<StringPiece>& args, IDiagnostics* diagnostics) {
diff --git a/tools/aapt2/format/binary/TableFlattener.cpp b/tools/aapt2/format/binary/TableFlattener.cpp
index 4a1b46c..2a51df3 100644
--- a/tools/aapt2/format/binary/TableFlattener.cpp
+++ b/tools/aapt2/format/binary/TableFlattener.cpp
@@ -23,6 +23,7 @@
 
 #include "android-base/logging.h"
 #include "android-base/macros.h"
+#include "android-base/stringprintf.h"
 
 #include "ResourceTable.h"
 #include "ResourceValues.h"
@@ -579,7 +580,15 @@
       // Write a self mapping entry for this package if the ID is non-standard (0x7f).
       const uint8_t package_id = package->id.value();
       if (package_id != kFrameworkPackageId && package_id != kAppPackageId) {
-        table->included_packages_[package_id] = package->name;
+        auto result = table->included_packages_.insert({package_id, package->name});
+        if (!result.second && result.first->second != package->name) {
+          // A mapping for this package ID already exists, and is a different package. Error!
+          context->GetDiagnostics()->Error(
+              DiagMessage() << android::base::StringPrintf(
+                  "can't map package ID %02x to '%s'. Already mapped to '%s'", package_id,
+                  package->name.c_str(), result.first->second.c_str()));
+          return false;
+        }
       }
     }