--- src/lib/tzcode/CMakeLists.txt.orig	2022-05-24 21:51:37.355897000 +0300
+++ src/lib/tzcode/CMakeLists.txt	2022-05-24 21:55:26.136676000 +0300
@@ -1,57 +1,3 @@
 add_library(tzcode STATIC
             strftime.c strptime.c timelocal.c localtime.c timezone.c)
 target_link_libraries(tzcode)
-
-set(TZCODE_PROJECT tzcode-iana)
-set(TZCODE_BUILD_DIR ${CMAKE_CURRENT_BINARY_DIR})
-set(TZCODE_PREFIX_DIR tz)
-set(TZCODE_PREFIX ${TZCODE_BUILD_DIR}/${TZCODE_PREFIX_DIR})
-set(TZDATA_TARGET main.zi)
-set(TZCODE_SRC ${PROJECT_SOURCE_DIR}/src/lib/tzcode)
-set(TZLUA_SRC ${PROJECT_SOURCE_DIR}/src/lua)
-
-set(TZDATA_FULL_TARGET
-    ${TZCODE_PREFIX}/src/${TZCODE_PROJECT}/${TZDATA_TARGET})
-
-ExternalProject_Add(${TZCODE_PROJECT}
-    GIT_REPOSITORY https://github.com/tarantool/tz
-    GIT_TAG 2022a
-    GIT_SHALLOW YES
-
-    EXCLUDE_FROM_ALL 1
-    INSTALL_DIR ${TZCODE_BUILD_DIR}/install
-    PREFIX ${TZCODE_PREFIX_DIR}
-
-    UPDATE_COMMAND ""
-    CONFIGURE_COMMAND ""
-
-    BUILD_COMMAND ${CMAKE_COMMAND} -E env
-        CC=${CMAKE_C_COMPILER}
-        CFLAGS=${CMAKE_C_FLAGS}
-        PACKRATDATA=backzone
-        make -C <SOURCE_DIR> ${TZDATA_TARGET}
-    BUILD_IN_SOURCE TRUE
-    TEST_COMMAND ""
-    INSTALL_COMMAND make DESTDIR=<INSTALL_DIR> install
-    BUILD_BYPRODUCTS ${TZDATA_FULL_TARGET}
-)
-
-find_program(PERL perl)
-
-add_custom_target(gen-timezones DEPENDS ${TZCODE_PROJECT})
-add_custom_command(TARGET gen-timezones
-    COMMAND
-    ${PERL} ${TZCODE_SRC}/gen-zone-abbrevs.pl
-        ${TZCODE_SRC}/zone-abbrevs.txt ${TZDATA_FULL_TARGET}
-        ${TZCODE_SRC}/timezones.h ${TZLUA_SRC}/timezones.lua
-    COMMENT "Generating timezones.h and timezones.lua"
-)
-
-# We excluded build of gen-timezones and tzcode-iana (main.zi) targets
-# from ALL dependencies (see EXCLUDE_FROM_ALL=1) if you, by either reason
-# need to regenerate timezones.h then invoke target manually:
-# ```sh
-#   make gen-timezones VERBOSE=1
-# ```
-# it will regenerate `timezones.h`, `timezones.lua` in-place, in their
-# repository location.