diff -up shaderc-f76bb2f09f858c3014b329961d836964e515095d/CMakeLists.txt.orig shaderc-f76bb2f09f858c3014b329961d836964e515095d/CMakeLists.txt
--- shaderc-f76bb2f09f858c3014b329961d836964e515095d/CMakeLists.txt.orig        2020-01-22 21:15:53.000000000 +0100
+++ shaderc-f76bb2f09f858c3014b329961d836964e515095d/CMakeLists.txt     2020-02-02 21:06:15.193583552 +0100
@@ -92,7 +92,6 @@ endif(MSVC)
 
 # Configure subdirectories.
 # We depend on these for later projects, so they should come first.
-add_subdirectory(third_party)
 
 if(SHADERC_ENABLE_SPVC)
 add_subdirectory(libshaderc_spvc)
@@ -103,11 +102,6 @@ add_subdirectory(libshaderc)
 add_subdirectory(glslc)
 add_subdirectory(examples)
 
-add_custom_target(build-version
-  ${PYTHON_EXECUTABLE}
-  ${CMAKE_CURRENT_SOURCE_DIR}/utils/update_build_version.py
-  ${shaderc_SOURCE_DIR} ${spirv-tools_SOURCE_DIR} ${glslang_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR}/build-version.inc
-  COMMENT "Update build-version.inc in the Shaderc build directory (if necessary).")
 
 function(define_pkg_config_file NAME LIBS)
   add_custom_target(${NAME}-pkg-config ALL