diff --git a/scripts/xtensa-build-zephyr.py b/scripts/xtensa-build-zephyr.py
index 4f1deed0eb26..4914120170c3 100755
--- a/scripts/xtensa-build-zephyr.py
+++ b/scripts/xtensa-build-zephyr.py
@@ -877,16 +877,6 @@ def build_platforms():
 			else: # unknown failure
 				raise cpe
 
-		smex_executable = pathlib.Path(west_top, platform_build_dir_name, "zephyr", "smex_ep",
-			"build", "smex")
-		fw_ldc_file = pathlib.Path(sof_platform_output_dir, f"sof-{platform}.ldc")
-		input_elf_file = pathlib.Path(west_top, platform_build_dir_name, "zephyr", "zephyr.elf")
-		# Extract metadata
-		execute_command([str(smex_executable), "-l", str(fw_ldc_file), str(input_elf_file)])
-
-		for p_alias in platform_configs[platform].aliases:
-			symlink_or_copy(sof_platform_output_dir, f"sof-{platform}.ldc", sof_platform_output_dir, f"sof-{p_alias}.ldc")
-
 		# reproducible-zephyr.ri is less useful now that show_installed_files() shows
 		# checksums too. However: - it's still useful when only the .ri file is
 		# available (no build logs for the other image), - it makes sure sof_ri_info.py
@@ -900,15 +890,6 @@ def build_platforms():
 	src_dest_list = []
 	tools_output_dir = pathlib.Path(STAGING_DIR, "tools")
 
-	# Install sof-logger from the last platform built (requires building at least one platform).
-	if platform_build_dir_name:
-		sof_logger_dir = pathlib.Path(west_top, platform_build_dir_name, "zephyr",
-					      "sof-logger_ep", "build", "logger")
-		sof_logger_executable_to_copy = pathlib.Path(shutil.which("sof-logger", path=sof_logger_dir))
-		sof_logger_installed_file = pathlib.Path(tools_output_dir, sof_logger_executable_to_copy.name).resolve()
-
-		src_dest_list += [(sof_logger_executable_to_copy, sof_logger_installed_file)]
-
 	src_dest_list += [(pathlib.Path(SOF_TOP) /
 		"tools" / "mtrace"/ "mtrace-reader.py",
 		tools_output_dir / "mtrace-reader.py")]
diff --git a/zephyr/CMakeLists.txt b/zephyr/CMakeLists.txt
index 7e6014c12841..2e7331fe827f 100644
--- a/zephyr/CMakeLists.txt
+++ b/zephyr/CMakeLists.txt
@@ -128,27 +128,6 @@ set(RIMAGE_TOP ${sof_top_dir}/tools/rimage)
 set(RIMAGE_CONFIG_PATH ${RIMAGE_TOP}/config CACHE PATH
     " Path to rimage board configuration files")
 
-include(ExternalProject)
-
-ExternalProject_Add(smex_ep
-	SOURCE_DIR "${ZEPHYR_SOF_MODULE_DIR}/smex/"
-	# The default paths are very "deep"
-	PREFIX     "${PROJECT_BINARY_DIR}/smex_ep"
-	BINARY_DIR "${PROJECT_BINARY_DIR}/smex_ep/build"
-	BUILD_ALWAYS 1
-	INSTALL_COMMAND "" # need smex only at build time
-)
-
-ExternalProject_Add(sof_logger_ep
-	SOURCE_DIR "${ZEPHYR_SOF_MODULE_DIR}/tools/"
-	# The default paths are very "deep"
-	PREFIX     "${PROJECT_BINARY_DIR}/sof-logger_ep"
-	BINARY_DIR "${PROJECT_BINARY_DIR}/sof-logger_ep/build"
-	BUILD_COMMAND cmake --build . --target sof-logger
-	BUILD_ALWAYS 1
-	INSTALL_COMMAND ""
-)
-
 # default SOF includes
 target_include_directories(SOF INTERFACE ${RIMAGE_TOP}/src/include)
 target_include_directories(SOF INTERFACE ${SOF_SRC_PATH}/include)