Update

[ghstack-poisoned]

Author: GregoryComer

third-party/CMakeLists.txt

@@ -34,8 +34,8 @@ endif()
 # Otherwise, flatc will target the project's toolchain (i.e. iOS, or Android).
 ExternalProject_Add(
   flatbuffers_ep
-  PREFIX ${CMAKE_CURRENT_BINARY_DIR}/flatc_ep
-  BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/flatc_ep/src/build
+  PREFIX ${CMAKE_CURRENT_BINARY_DIR}/flatc_proj
+  BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/flatc_proj/src/build
   SOURCE_DIR ${PROJECT_SOURCE_DIR}/third-party/flatbuffers
   CMAKE_ARGS -DFLATBUFFERS_BUILD_FLATC=ON
              -DFLATBUFFERS_INSTALL=ON