diff --git a/lib/ClangImporter/ClangIncludePaths.cpp b/lib/ClangImporter/ClangIncludePaths.cpp
index 172cc5d952fda..c8ed4079f570c 100644
--- a/lib/ClangImporter/ClangIncludePaths.cpp
+++ b/lib/ClangImporter/ClangIncludePaths.cpp
@@ -418,29 +418,6 @@ GetPlatformAuxiliaryFile(StringRef Platform, StringRef File,
   return "";
 }
 
-SmallVector<std::pair<std::string, std::string>, 2>
-GetAndroidFileMappings(
-    ASTContext &Context, const std::string &sysroot,
-    const llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> &VFS) {
-  const llvm::Triple &Triple = Context.LangOpts.Target;
-  const SearchPathOptions &SearchPathOpts = Context.SearchPathOpts;
-  SmallVector<std::pair<std::string, std::string>, 2> Mappings;
-  std::string AuxiliaryFile;
-
-  if (!Triple.isAndroid()) return Mappings;
-
-  llvm::SmallString<261> NDKInjection{sysroot};
-  llvm::sys::path::append(NDKInjection, "posix_filesystem.apinotes");
-
-  AuxiliaryFile =
-      GetPlatformAuxiliaryFile("android", "posix_filesystem.apinotes",
-                               SearchPathOpts);
-  if (!AuxiliaryFile.empty())
-    Mappings.emplace_back(std::string(NDKInjection), AuxiliaryFile);
-
-  return Mappings;
-}
-
 SmallVector<std::pair<std::string, std::string>, 2> GetWindowsFileMappings(
     ASTContext &Context,
     const llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> &driverVFS,
@@ -612,9 +589,5 @@ ClangInvocationFileMapping swift::getClangInvocationFileMapping(
 
   result.redirectedFiles.append(GetWindowsFileMappings(
       ctx, vfs, result.requiresBuiltinHeadersInSystemModules));
-
-  result.redirectedFiles.append(GetAndroidFileMappings(ctx, sysroot.str().str(),
-                                                       vfs));
-
   return result;
 }
diff --git a/stdlib/public/Platform/CMakeLists.txt b/stdlib/public/Platform/CMakeLists.txt
index 996e072ee1a31..928b5d9cb6302 100644
--- a/stdlib/public/Platform/CMakeLists.txt
+++ b/stdlib/public/Platform/CMakeLists.txt
@@ -474,10 +474,23 @@ if("ANDROID" IN_LIST SWIFT_SDKS)
     endif()
   endforeach()
 
+  set(android_posix_filesystem_apinotes_source "posix_filesystem.apinotes")
+  set(apinotes_subdir "${SWIFTLIB_DIR}/apinotes")
+  add_custom_command_target(
+    copy_android_posix_filesystem_apinotes_resource
+    COMMAND
+      "${CMAKE_COMMAND}" "-E" "make_directory" ${apinotes_subdir}
+    COMMAND
+      "${CMAKE_COMMAND}" "-E" "copy_if_different"
+        "${CMAKE_CURRENT_SOURCE_DIR}/${android_posix_filesystem_apinotes_source}" ${apinotes_subdir}
+    OUTPUT ${apinotes_subdir}/${android_posix_filesystem_apinotes_source}
+    COMMENT "Copying Android posix_filesystem API notes to resource directories")
+  add_dependencies(sdk-overlay ${copy_android_posix_filesystem_apinotes_resource})
+  list(APPEND android_modulemap_target_list ${copy_android_posix_filesystem_apinotes_resource})
   swift_install_in_component(FILES
-      posix_filesystem.apinotes
-    DESTINATION "share"
-    COMPONENT sdk-overlay)
+                              "${android_posix_filesystem_apinotes_source}"
+                             DESTINATION "lib/swift/apinotes"
+                             COMPONENT sdk-overlay)
 endif()
 add_custom_target(android_modulemap DEPENDS ${android_modulemap_target_list})
 set_property(TARGET android_modulemap PROPERTY FOLDER "Miscellaneous")