diff --git a/common/utils.cc b/common/utils.cc
index 3a89c2a..0f3b6c6 100644
--- a/common/utils.cc
+++ b/common/utils.cc
@@ -492,6 +492,11 @@
   return lstat(path, &stbuf) == 0 && S_ISLNK(stbuf.st_mode) != 0;
 }
 
+bool IsRegFile(const char* path) {
+  struct stat stbuf;
+  return lstat(path, &stbuf) == 0 && S_ISREG(stbuf.st_mode) != 0;
+}
+
 bool MakeTempFile(const string& base_filename_template,
                   string* filename,
                   int* fd) {
diff --git a/common/utils.h b/common/utils.h
index 616de06..5f6e475 100644
--- a/common/utils.h
+++ b/common/utils.h
@@ -144,6 +144,9 @@
 // Returns true if |path| exists and is a symbolic link.
 bool IsSymlink(const char* path);
 
+// Return true iff |path| exists and is a regular file
+bool IsRegFile(const char* path);
+
 // If |base_filename_template| is neither absolute (starts with "/") nor
 // explicitly relative to the current working directory (starts with "./" or
 // "../"), then it is prepended the system's temporary directory. On success,
diff --git a/payload_generator/generate_delta_main.cc b/payload_generator/generate_delta_main.cc
index 5e2e555..7288eca 100644
--- a/payload_generator/generate_delta_main.cc
+++ b/payload_generator/generate_delta_main.cc
@@ -425,6 +425,8 @@
       disable_vabc,
       false,
       "Whether to disable Virtual AB Compression when installing the OTA");
+  DEFINE_string(
+      apex_info_file, "", "Path to META/apex_info.pb found in target build");
 
   brillo::FlagHelper::Init(
       argc,
@@ -532,6 +534,15 @@
     return 1;
   }
 
+  if (!FLAGS_apex_info_file.empty()) {
+    // apex_info_file should point to a regular file(or symlink to a regular
+    // file)
+    CHECK(utils::FileExists(FLAGS_apex_info_file.c_str()));
+    CHECK(utils::IsRegFile(FLAGS_apex_info_file.c_str()) ||
+          utils::IsSymlink(FLAGS_apex_info_file.c_str()));
+    payload_config.apex_info_file = FLAGS_apex_info_file;
+  }
+
   if (!FLAGS_new_partitions.empty()) {
     LOG_IF(FATAL, !FLAGS_new_image.empty() || !FLAGS_new_kernel.empty())
         << "--new_image and --new_kernel are deprecated, please use "
diff --git a/payload_generator/payload_file.cc b/payload_generator/payload_file.cc
index 1174597..4334066 100644
--- a/payload_generator/payload_file.cc
+++ b/payload_generator/payload_file.cc
@@ -25,6 +25,7 @@
 #include <base/strings/stringprintf.h>
 
 #include "update_engine/common/hash_calculator.h"
+#include "update_engine/common/utils.h"
 #include "update_engine/payload_consumer/delta_performer.h"
 #include "update_engine/payload_consumer/file_writer.h"
 #include "update_engine/payload_consumer/payload_constants.h"
@@ -77,6 +78,20 @@
   if (config.is_partial_update) {
     manifest_.set_partial_update(true);
   }
+
+  if (!config.apex_info_file.empty()) {
+    ApexMetadata apex_metadata;
+    int fd = open(config.apex_info_file.c_str(), O_RDONLY);
+    if (fd < 0) {
+      PLOG(FATAL) << "Failed to open " << config.apex_info_file << " for read.";
+    }
+    ScopedFdCloser closer{&fd};
+    CHECK(apex_metadata.ParseFromFileDescriptor(fd));
+    if (apex_metadata.apex_info_size() > 0) {
+      *manifest_.mutable_apex_info() =
+          std::move(*apex_metadata.mutable_apex_info());
+    }
+  }
   return true;
 }
 
diff --git a/payload_generator/payload_generation_config.h b/payload_generator/payload_generation_config.h
index 64733e1..f7d0b6b 100644
--- a/payload_generator/payload_generation_config.h
+++ b/payload_generator/payload_generation_config.h
@@ -235,6 +235,9 @@
   // support VABC in order to use it. If this is set to false, device must not
   // use VABC regardless.
   bool disable_vabc = false;
+
+  // Path to apex_info.pb, extracted from target_file.zip
+  std::string apex_info_file;
 };
 
 }  // namespace chromeos_update_engine
diff --git a/scripts/brillo_update_payload b/scripts/brillo_update_payload
index 439a42a..c510148 100755
--- a/scripts/brillo_update_payload
+++ b/scripts/brillo_update_payload
@@ -284,6 +284,9 @@
 # Path to the dynamic partition info file in target image if exists.
 DYNAMIC_PARTITION_INFO_FILE=""
 
+# Path to the META/apex_info.pb found in target build
+APEX_INFO_FILE=""
+
 # read_option_int <file.txt> <option_key> [default_value]
 #
 # Reads the unsigned integer value associated with |option_key| in a key=value
@@ -567,6 +570,13 @@
         "${dynamic_partitions_info}"
       DYNAMIC_PARTITION_INFO_FILE="${dynamic_partitions_info}"
     fi
+    local apex_info=$(create_tempfile "apex_info.XXXXXX")
+    CLEANUP_FILES+=("${apex_info}")
+    if unzip -l "${image}" "META/apex_info.pb" > /dev/null; then
+      extract_file "${image}" "META/apex_info.pb" \
+        "${apex_info}"
+      APEX_INFO_FILE="${apex_info}"
+    fi
   fi
 
   local part
@@ -734,6 +744,11 @@
       --dynamic_partition_info_file="${DYNAMIC_PARTITION_INFO_FILE}"
     )
   fi
+  if [[ -n "{APEX_INFO_FILE}" ]]; then
+    GENERATOR_ARGS+=(
+      --apex_info_file="${APEX_INFO_FILE}"
+    )
+  fi
 
   echo "Running delta_generator with args: ${GENERATOR_ARGS[@]}"
   "${GENERATOR}" "${GENERATOR_ARGS[@]}"
diff --git a/scripts/update_payload/update_metadata_pb2.py b/scripts/update_payload/update_metadata_pb2.py
index 3ae9713..1641229 100644
--- a/scripts/update_payload/update_metadata_pb2.py
+++ b/scripts/update_payload/update_metadata_pb2.py
@@ -20,7 +20,7 @@
   package='chromeos_update_engine',
   syntax='proto2',
   serialized_options=_b('H\003'),
-  serialized_pb=_b('\n\x15update_metadata.proto\x12\x16\x63hromeos_update_engine\"1\n\x06\x45xtent\x12\x13\n\x0bstart_block\x18\x01 \x01(\x04\x12\x12\n\nnum_blocks\x18\x02 \x01(\x04\"\x9f\x01\n\nSignatures\x12@\n\nsignatures\x18\x01 \x03(\x0b\x32,.chromeos_update_engine.Signatures.Signature\x1aO\n\tSignature\x12\x13\n\x07version\x18\x01 \x01(\rB\x02\x18\x01\x12\x0c\n\x04\x64\x61ta\x18\x02 \x01(\x0c\x12\x1f\n\x17unpadded_signature_size\x18\x03 \x01(\x07\"+\n\rPartitionInfo\x12\x0c\n\x04size\x18\x01 \x01(\x04\x12\x0c\n\x04hash\x18\x02 \x01(\x0c\"\x8f\x01\n\tImageInfo\x12\x11\n\x05\x62oard\x18\x01 \x01(\tB\x02\x18\x01\x12\x0f\n\x03key\x18\x02 \x01(\tB\x02\x18\x01\x12\x13\n\x07\x63hannel\x18\x03 \x01(\tB\x02\x18\x01\x12\x13\n\x07version\x18\x04 \x01(\tB\x02\x18\x01\x12\x19\n\rbuild_channel\x18\x05 \x01(\tB\x02\x18\x01\x12\x19\n\rbuild_version\x18\x06 \x01(\tB\x02\x18\x01\"\xee\x03\n\x10InstallOperation\x12;\n\x04type\x18\x01 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+  serialized_pb=_b('\n\x15update_metadata.proto\x12\x16\x63hromeos_update_engine\"1\n\x06\x45xtent\x12\x13\n\x0bstart_block\x18\x01 \x01(\x04\x12\x12\n\nnum_blocks\x18\x02 \x01(\x04\"\x9f\x01\n\nSignatures\x12@\n\nsignatures\x18\x01 \x03(\x0b\x32,.chromeos_update_engine.Signatures.Signature\x1aO\n\tSignature\x12\x13\n\x07version\x18\x01 \x01(\rB\x02\x18\x01\x12\x0c\n\x04\x64\x61ta\x18\x02 \x01(\x0c\x12\x1f\n\x17unpadded_signature_size\x18\x03 \x01(\x07\"+\n\rPartitionInfo\x12\x0c\n\x04size\x18\x01 \x01(\x04\x12\x0c\n\x04hash\x18\x02 \x01(\x0c\"\x8f\x01\n\tImageInfo\x12\x11\n\x05\x62oard\x18\x01 \x01(\tB\x02\x18\x01\x12\x0f\n\x03key\x18\x02 \x01(\tB\x02\x18\x01\x12\x13\n\x07\x63hannel\x18\x03 \x01(\tB\x02\x18\x01\x12\x13\n\x07version\x18\x04 \x01(\tB\x02\x18\x01\x12\x19\n\rbuild_channel\x18\x05 \x01(\tB\x02\x18\x01\x12\x19\n\rbuild_version\x18\x06 \x01(\tB\x02\x18\x01\"\xee\x03\n\x10InstallOperation\x12;\n\x04type\x18\x01 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\x01(\x0b\x32\x1e.chromeos_update_engine.Extent\x12\x38\n\x10hash_tree_extent\x18\x0b \x01(\x0b\x32\x1e.chromeos_update_engine.Extent\x12\x1b\n\x13hash_tree_algorithm\x18\x0c \x01(\t\x12\x16\n\x0ehash_tree_salt\x18\r \x01(\x0c\x12\x37\n\x0f\x66\x65\x63_data_extent\x18\x0e \x01(\x0b\x32\x1e.chromeos_update_engine.Extent\x12\x32\n\nfec_extent\x18\x0f \x01(\x0b\x32\x1e.chromeos_update_engine.Extent\x12\x14\n\tfec_roots\x18\x10 \x01(\r:\x01\x32\x12\x0f\n\x07version\x18\x11 \x01(\t\x12\x43\n\x10merge_operations\x18\x12 \x03(\x0b\x32).chromeos_update_engine.CowMergeOperation\x12\x19\n\x11\x65stimate_cow_size\x18\x13 \x01(\x04\"L\n\x15\x44ynamicPartitionGroup\x12\x0c\n\x04name\x18\x01 \x02(\t\x12\x0c\n\x04size\x18\x02 \x01(\x04\x12\x17\n\x0fpartition_names\x18\x03 \x03(\t\"\x89\x01\n\x18\x44ynamicPartitionMetadata\x12=\n\x06groups\x18\x01 \x03(\x0b\x32-.chromeos_update_engine.DynamicPartitionGroup\x12\x18\n\x10snapshot_enabled\x18\x02 \x01(\x08\x12\x14\n\x0cvabc_enabled\x18\x03 \x01(\x08\"c\n\x08\x41pexInfo\x12\x14\n\x0cpackage_name\x18\x01 \x01(\t\x12\x0f\n\x07version\x18\x02 \x01(\x03\x12\x15\n\ris_compressed\x18\x03 \x01(\x08\x12\x19\n\x11\x64\x65\x63ompressed_size\x18\x04 \x01(\x03\"C\n\x0c\x41pexMetadata\x12\x33\n\tapex_info\x18\x01 \x03(\x0b\x32 .chromeos_update_engine.ApexInfo\"\x9e\x07\n\x14\x44\x65ltaArchiveManifest\x12H\n\x12install_operations\x18\x01 \x03(\x0b\x32(.chromeos_update_engine.InstallOperationB\x02\x18\x01\x12O\n\x19kernel_install_operations\x18\x02 \x03(\x0b\x32(.chromeos_update_engine.InstallOperationB\x02\x18\x01\x12\x18\n\nblock_size\x18\x03 \x01(\r:\x04\x34\x30\x39\x36\x12\x19\n\x11signatures_offset\x18\x04 \x01(\x04\x12\x17\n\x0fsignatures_size\x18\x05 \x01(\x04\x12\x42\n\x0fold_kernel_info\x18\x06 \x01(\x0b\x32%.chromeos_update_engine.PartitionInfoB\x02\x18\x01\x12\x42\n\x0fnew_kernel_info\x18\x07 \x01(\x0b\x32%.chromeos_update_engine.PartitionInfoB\x02\x18\x01\x12\x42\n\x0fold_rootfs_info\x18\x08 \x01(\x0b\x32%.chromeos_update_engine.PartitionInfoB\x02\x18\x01\x12\x42\n\x0fnew_rootfs_info\x18\t \x01(\x0b\x32%.chromeos_update_engine.PartitionInfoB\x02\x18\x01\x12=\n\x0eold_image_info\x18\n \x01(\x0b\x32!.chromeos_update_engine.ImageInfoB\x02\x18\x01\x12=\n\x0enew_image_info\x18\x0b \x01(\x0b\x32!.chromeos_update_engine.ImageInfoB\x02\x18\x01\x12\x18\n\rminor_version\x18\x0c \x01(\r:\x01\x30\x12;\n\npartitions\x18\r \x03(\x0b\x32\'.chromeos_update_engine.PartitionUpdate\x12\x15\n\rmax_timestamp\x18\x0e \x01(\x03\x12T\n\x1a\x64ynamic_partition_metadata\x18\x0f \x01(\x0b\x32\x30.chromeos_update_engine.DynamicPartitionMetadata\x12\x16\n\x0epartial_update\x18\x10 \x01(\x08\x12\x33\n\tapex_info\x18\x11 \x03(\x0b\x32 .chromeos_update_engine.ApexInfoB\x02H\x03')
 )
 
 
@@ -752,6 +752,37 @@
 )
 
 
+_APEXMETADATA = _descriptor.Descriptor(
+  name='ApexMetadata',
+  full_name='chromeos_update_engine.ApexMetadata',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='apex_info', full_name='chromeos_update_engine.ApexMetadata.apex_info', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2322,
+  serialized_end=2389,
+)
+
+
 _DELTAARCHIVEMANIFEST = _descriptor.Descriptor(
   name='DeltaArchiveManifest',
   full_name='chromeos_update_engine.DeltaArchiveManifest',
@@ -890,8 +921,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=2323,
-  serialized_end=3249,
+  serialized_start=2392,
+  serialized_end=3318,
 )
 
 _SIGNATURES_SIGNATURE.containing_type = _SIGNATURES
@@ -914,6 +945,7 @@
 _PARTITIONUPDATE.fields_by_name['fec_extent'].message_type = _EXTENT
 _PARTITIONUPDATE.fields_by_name['merge_operations'].message_type = _COWMERGEOPERATION
 _DYNAMICPARTITIONMETADATA.fields_by_name['groups'].message_type = _DYNAMICPARTITIONGROUP
+_APEXMETADATA.fields_by_name['apex_info'].message_type = _APEXINFO
 _DELTAARCHIVEMANIFEST.fields_by_name['install_operations'].message_type = _INSTALLOPERATION
 _DELTAARCHIVEMANIFEST.fields_by_name['kernel_install_operations'].message_type = _INSTALLOPERATION
 _DELTAARCHIVEMANIFEST.fields_by_name['old_kernel_info'].message_type = _PARTITIONINFO
@@ -935,6 +967,7 @@
 DESCRIPTOR.message_types_by_name['DynamicPartitionGroup'] = _DYNAMICPARTITIONGROUP
 DESCRIPTOR.message_types_by_name['DynamicPartitionMetadata'] = _DYNAMICPARTITIONMETADATA
 DESCRIPTOR.message_types_by_name['ApexInfo'] = _APEXINFO
+DESCRIPTOR.message_types_by_name['ApexMetadata'] = _APEXMETADATA
 DESCRIPTOR.message_types_by_name['DeltaArchiveManifest'] = _DELTAARCHIVEMANIFEST
 _sym_db.RegisterFileDescriptor(DESCRIPTOR)
 
@@ -1016,6 +1049,13 @@
   })
 _sym_db.RegisterMessage(ApexInfo)
 
+ApexMetadata = _reflection.GeneratedProtocolMessageType('ApexMetadata', (_message.Message,), {
+  'DESCRIPTOR' : _APEXMETADATA,
+  '__module__' : 'update_metadata_pb2'
+  # @@protoc_insertion_point(class_scope:chromeos_update_engine.ApexMetadata)
+  })
+_sym_db.RegisterMessage(ApexMetadata)
+
 DeltaArchiveManifest = _reflection.GeneratedProtocolMessageType('DeltaArchiveManifest', (_message.Message,), {
   'DESCRIPTOR' : _DELTAARCHIVEMANIFEST,
   '__module__' : 'update_metadata_pb2'
diff --git a/update_metadata.proto b/update_metadata.proto
index ffc78b6..a1f093c 100644
--- a/update_metadata.proto
+++ b/update_metadata.proto
@@ -365,6 +365,12 @@
   optional int64 decompressed_size = 4;
 }
 
+// Definition has been duplicated from
+// $ANDROID_BUILD_TOP/build/tools/releasetools/ota_metadata.proto. Keep in sync.
+message ApexMetadata {
+  repeated ApexInfo apex_info = 1;
+}
+
 message DeltaArchiveManifest {
   // Only present in major version = 1. List of install operations for the
   // kernel and rootfs partitions. For major version = 2 see the |partitions|