Index: cmake/modules/AddLLDB.cmake
===================================================================
--- cmake/modules/AddLLDB.cmake
+++ cmake/modules/AddLLDB.cmake
@@ -93,7 +93,7 @@
   # Hack: only some LLDB libraries depend on the clang autogenerated headers,
   # but it is simple enough to make all of LLDB depend on some of those
   # headers without negatively impacting much of anything.
-  if(NOT LLDB_BUILT_STANDALONE)
+  if(NOT LLDB_BUILT_STANDALONE AND NOT LLVM_ENABLE_SPHINX)
     add_dependencies(${name} clang-tablegen-targets)
   endif()