diff --git a/lldb/source/API/CMakeLists.txt b/lldb/source/API/CMakeLists.txt
index aa31caddfde3a..76b42ecf63f91 100644
--- a/lldb/source/API/CMakeLists.txt
+++ b/lldb/source/API/CMakeLists.txt
@@ -23,14 +23,17 @@ endif()
 # Generate SBLanguages.h from Dwarf.def.
 set(sb_languages_file
   ${CMAKE_CURRENT_BINARY_DIR}/../../include/lldb/API/SBLanguages.h)
+set(sb_languages_generator
+  ${LLDB_SOURCE_DIR}/scripts/generate-sbapi-dwarf-enum.py)
 add_custom_command(
   COMMENT "Generating SBLanguages.h from Dwarf.def"
   COMMAND "${Python3_EXECUTABLE}"
-      ${LLDB_SOURCE_DIR}/scripts/generate-sbapi-dwarf-enum.py
+      ${sb_languages_generator}
       ${LLVM_MAIN_INCLUDE_DIR}/llvm/BinaryFormat/Dwarf.def
       -o ${sb_languages_file}
   OUTPUT ${sb_languages_file}
   DEPENDS ${LLVM_MAIN_INCLUDE_DIR}/llvm/BinaryFormat/Dwarf.def
+          ${sb_languages_generator}
   WORKING_DIRECTORY ${LLVM_LIBRARY_OUTPUT_INTDIR}
 )
 add_custom_target(lldb-sbapi-dwarf-enums