diff --git a/Meta/CMake/locale_data.cmake b/Meta/CMake/locale_data.cmake
index d2b332eea1..9f318db1a9 100644
--- a/Meta/CMake/locale_data.cmake
+++ b/Meta/CMake/locale_data.cmake
@@ -31,14 +31,18 @@ set(CLDR_UNITS_PATH "${CLDR_PATH}/${CLDR_UNITS_SOURCE}")
 if (ENABLE_UNICODE_DATABASE_DOWNLOAD)
     remove_path_if_version_changed("${CLDR_VERSION}" "${CLDR_VERSION_FILE}" "${CLDR_PATH}")
 
-    download_file("${CLDR_ZIP_URL}" "${CLDR_ZIP_PATH}")
-    extract_path("${CLDR_PATH}" "${CLDR_ZIP_PATH}" "${CLDR_BCP47_SOURCE}/**" "${CLDR_BCP47_PATH}")
-    extract_path("${CLDR_PATH}" "${CLDR_ZIP_PATH}" "${CLDR_CORE_SOURCE}/**" "${CLDR_CORE_PATH}")
-    extract_path("${CLDR_PATH}" "${CLDR_ZIP_PATH}" "${CLDR_DATES_SOURCE}/**" "${CLDR_DATES_PATH}")
-    extract_path("${CLDR_PATH}" "${CLDR_ZIP_PATH}" "${CLDR_LOCALES_SOURCE}/**" "${CLDR_LOCALES_PATH}")
-    extract_path("${CLDR_PATH}" "${CLDR_ZIP_PATH}" "${CLDR_MISC_SOURCE}/**" "${CLDR_MISC_PATH}")
-    extract_path("${CLDR_PATH}" "${CLDR_ZIP_PATH}" "${CLDR_NUMBERS_SOURCE}/**" "${CLDR_NUMBERS_PATH}")
-    extract_path("${CLDR_PATH}" "${CLDR_ZIP_PATH}" "${CLDR_UNITS_SOURCE}/**" "${CLDR_UNITS_PATH}")
+    if (ENABLE_NETWORK_DOWNLOADS)
+        download_file("${CLDR_ZIP_URL}" "${CLDR_ZIP_PATH}")
+        extract_path("${CLDR_PATH}" "${CLDR_ZIP_PATH}" "${CLDR_BCP47_SOURCE}/**" "${CLDR_BCP47_PATH}")
+        extract_path("${CLDR_PATH}" "${CLDR_ZIP_PATH}" "${CLDR_CORE_SOURCE}/**" "${CLDR_CORE_PATH}")
+        extract_path("${CLDR_PATH}" "${CLDR_ZIP_PATH}" "${CLDR_DATES_SOURCE}/**" "${CLDR_DATES_PATH}")
+        extract_path("${CLDR_PATH}" "${CLDR_ZIP_PATH}" "${CLDR_LOCALES_SOURCE}/**" "${CLDR_LOCALES_PATH}")
+        extract_path("${CLDR_PATH}" "${CLDR_ZIP_PATH}" "${CLDR_MISC_SOURCE}/**" "${CLDR_MISC_PATH}")
+        extract_path("${CLDR_PATH}" "${CLDR_ZIP_PATH}" "${CLDR_NUMBERS_SOURCE}/**" "${CLDR_NUMBERS_PATH}")
+        extract_path("${CLDR_PATH}" "${CLDR_ZIP_PATH}" "${CLDR_UNITS_SOURCE}/**" "${CLDR_UNITS_PATH}")
+    else()
+        message(STATUS "Skipping download of ${CLDR_ZIP_URL}, expecting the archive to have been extracted to ${CLDR_PATH}")
+    endif()
 
     set(DATE_TIME_FORMAT_DATA_HEADER DateTimeFormatData.h)
     set(DATE_TIME_FORMAT_DATA_IMPLEMENTATION DateTimeFormatData.cpp)
diff --git a/Meta/CMake/time_zone_data.cmake b/Meta/CMake/time_zone_data.cmake
index 253d31d4e3..200297c672 100644
--- a/Meta/CMake/time_zone_data.cmake
+++ b/Meta/CMake/time_zone_data.cmake
@@ -56,17 +56,21 @@ endfunction()
 if (ENABLE_TIME_ZONE_DATABASE_DOWNLOAD)
     remove_path_if_version_changed("${TZDB_VERSION}" "${TZDB_VERSION_FILE}" "${TZDB_PATH}")
 
-    download_file("${TZDB_ZIP_URL}" "${TZDB_ZIP_PATH}")
-    extract_tzdb_file("${TZDB_AFRICA_SOURCE}" "${TZDB_AFRICA_PATH}")
-    extract_tzdb_file("${TZDB_ANTARCTICA_SOURCE}" "${TZDB_ANTARCTICA_PATH}")
-    extract_tzdb_file("${TZDB_ASIA_SOURCE}" "${TZDB_ASIA_PATH}")
-    extract_tzdb_file("${TZDB_AUSTRALASIA_SOURCE}" "${TZDB_AUSTRALASIA_PATH}")
-    extract_tzdb_file("${TZDB_BACKWARD_SOURCE}" "${TZDB_BACKWARD_PATH}")
-    extract_tzdb_file("${TZDB_ETCETERA_SOURCE}" "${TZDB_ETCETERA_PATH}")
-    extract_tzdb_file("${TZDB_EUROPE_SOURCE}" "${TZDB_EUROPE_PATH}")
-    extract_tzdb_file("${TZDB_NORTH_AMERICA_SOURCE}" "${TZDB_NORTH_AMERICA_PATH}")
-    extract_tzdb_file("${TZDB_SOUTH_AMERICA_SOURCE}" "${TZDB_SOUTH_AMERICA_PATH}")
-    extract_tzdb_file("${TZDB_ZONE_1970_SOURCE}" "${TZDB_ZONE_1970_PATH}")
+    if (ENABLE_NETWORK_DOWNLOADS)
+        download_file("${TZDB_ZIP_URL}" "${TZDB_ZIP_PATH}")
+        extract_tzdb_file("${TZDB_AFRICA_SOURCE}" "${TZDB_AFRICA_PATH}")
+        extract_tzdb_file("${TZDB_ANTARCTICA_SOURCE}" "${TZDB_ANTARCTICA_PATH}")
+        extract_tzdb_file("${TZDB_ASIA_SOURCE}" "${TZDB_ASIA_PATH}")
+        extract_tzdb_file("${TZDB_AUSTRALASIA_SOURCE}" "${TZDB_AUSTRALASIA_PATH}")
+        extract_tzdb_file("${TZDB_BACKWARD_SOURCE}" "${TZDB_BACKWARD_PATH}")
+        extract_tzdb_file("${TZDB_ETCETERA_SOURCE}" "${TZDB_ETCETERA_PATH}")
+        extract_tzdb_file("${TZDB_EUROPE_SOURCE}" "${TZDB_EUROPE_PATH}")
+        extract_tzdb_file("${TZDB_NORTH_AMERICA_SOURCE}" "${TZDB_NORTH_AMERICA_PATH}")
+        extract_tzdb_file("${TZDB_SOUTH_AMERICA_SOURCE}" "${TZDB_SOUTH_AMERICA_PATH}")
+        extract_tzdb_file("${TZDB_ZONE_1970_SOURCE}" "${TZDB_ZONE_1970_PATH}")
+    else()
+        message(STATUS "Skipping download of ${TZDB_ZIP_URL}, expecting the archive to have been extracted to ${TZDB_PATH}")
+    endif()
 
     invoke_generator(
         "TimeZoneData"
diff --git a/Meta/CMake/unicode_data.cmake b/Meta/CMake/unicode_data.cmake
index dc97c6362b..ba43f3dc18 100644
--- a/Meta/CMake/unicode_data.cmake
+++ b/Meta/CMake/unicode_data.cmake
@@ -71,27 +71,32 @@ set(EMOJI_INSTALL_PATH "${CMAKE_BINARY_DIR}/Root/home/anon/Documents/emoji.txt")
 if (ENABLE_UNICODE_DATABASE_DOWNLOAD)
     remove_path_if_version_changed("${UCD_VERSION}" "${UCD_VERSION_FILE}" "${UCD_PATH}")
 
-    download_file("${UCD_ZIP_URL}" "${UCD_ZIP_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${UNICODE_DATA_SOURCE}" "${UNICODE_DATA_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${SPECIAL_CASING_SOURCE}" "${SPECIAL_CASING_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${CASE_FOLDING_SOURCE}" "${CASE_FOLDING_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${DERIVED_GENERAL_CATEGORY_SOURCE}" "${DERIVED_GENERAL_CATEGORY_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${PROP_LIST_SOURCE}" "${PROP_LIST_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${DERIVED_CORE_PROP_SOURCE}" "${DERIVED_CORE_PROP_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${DERIVED_BINARY_PROP_SOURCE}" "${DERIVED_BINARY_PROP_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${PROP_ALIAS_SOURCE}" "${PROP_ALIAS_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${PROP_VALUE_ALIAS_SOURCE}" "${PROP_VALUE_ALIAS_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${NAME_ALIAS_SOURCE}" "${NAME_ALIAS_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${SCRIPTS_SOURCE}" "${SCRIPTS_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${SCRIPT_EXTENSIONS_SOURCE}" "${SCRIPT_EXTENSIONS_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${BLOCKS_SOURCE}" "${BLOCKS_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${EMOJI_DATA_SOURCE}" "${EMOJI_DATA_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${NORM_PROPS_SOURCE}" "${NORM_PROPS_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${GRAPHEME_BREAK_PROP_SOURCE}" "${GRAPHEME_BREAK_PROP_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${WORD_BREAK_PROP_SOURCE}" "${WORD_BREAK_PROP_PATH}")
-    extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${SENTENCE_BREAK_PROP_SOURCE}" "${SENTENCE_BREAK_PROP_PATH}")
+    if (ENABLE_NETWORK_DOWNLOADS)
+        download_file("${UCD_ZIP_URL}" "${UCD_ZIP_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${UNICODE_DATA_SOURCE}" "${UNICODE_DATA_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${SPECIAL_CASING_SOURCE}" "${SPECIAL_CASING_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${CASE_FOLDING_SOURCE}" "${CASE_FOLDING_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${DERIVED_GENERAL_CATEGORY_SOURCE}" "${DERIVED_GENERAL_CATEGORY_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${PROP_LIST_SOURCE}" "${PROP_LIST_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${DERIVED_CORE_PROP_SOURCE}" "${DERIVED_CORE_PROP_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${DERIVED_BINARY_PROP_SOURCE}" "${DERIVED_BINARY_PROP_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${PROP_ALIAS_SOURCE}" "${PROP_ALIAS_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${PROP_VALUE_ALIAS_SOURCE}" "${PROP_VALUE_ALIAS_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${NAME_ALIAS_SOURCE}" "${NAME_ALIAS_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${SCRIPTS_SOURCE}" "${SCRIPTS_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${SCRIPT_EXTENSIONS_SOURCE}" "${SCRIPT_EXTENSIONS_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${BLOCKS_SOURCE}" "${BLOCKS_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${EMOJI_DATA_SOURCE}" "${EMOJI_DATA_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${NORM_PROPS_SOURCE}" "${NORM_PROPS_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${GRAPHEME_BREAK_PROP_SOURCE}" "${GRAPHEME_BREAK_PROP_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${WORD_BREAK_PROP_SOURCE}" "${WORD_BREAK_PROP_PATH}")
+        extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${SENTENCE_BREAK_PROP_SOURCE}" "${SENTENCE_BREAK_PROP_PATH}")
 
-    download_file("${EMOJI_TEST_URL}" "${EMOJI_TEST_PATH}")
+        download_file("${EMOJI_TEST_URL}" "${EMOJI_TEST_PATH}")
+    else()
+        message(STATUS "Skipping download of ${UCD_ZIP_URL}, expecting the archive to have been extracted to ${UCD_ZIP_PATH}")
+        message(STATUS "Skipping download of ${EMOJI_TEST_URL}, expecting the archive to have been extracted to ${EMOJI_TEST_PATH}")
+    endif()
 
     set(UNICODE_DATA_HEADER UnicodeData.h)
     set(UNICODE_DATA_IMPLEMENTATION UnicodeData.cpp)