"cpptoml" that is not in the export set.

[bill-liu-pa]

I am trying to build it on Mac, but getting below error. How to get cpptoml ?

-- Configuring done
CMake Error: install(EXPORT "meta-exports" ...) includes target "meta-tokenizers" which requires target "cpptoml" that is not in the export set.
CMake Error: install(EXPORT "meta-exports" ...) includes target "meta-kernel" which requires target "cpptoml" that is not in the export set.
CMake Error: install(EXPORT "meta-exports" ...) includes target "meta-corpus" which requires target "cpptoml" that is not in the export set.
CMake Error: install(EXPORT "meta-exports" ...) includes target "meta-embeddings" which requires target "cpptoml" that is not in the export set.
CMake Error: install(EXPORT "meta-exports" ...) includes target "meta-eval" which requires target "cpptoml" that is not in the export set.
CMake Error: install(EXPORT "meta-exports" ...) includes target "meta-learn" which requires target "cpptoml" that is not in the export set.
CMake Error in CMakeLists.txt:
Target "meta-definitions" INTERFACE_INCLUDE_DIRECTORIES property contains
path:

"/Users/billliu/dev/uiuc/cs410-text-information-systems/meta/LIBCXX_PREFIX-NOTFOUND/c++/v1/"

which is prefixed in the source directory.

-- Generating done
CMake Generate step failed. Build files cannot be regenerated correctly.
make: *** [cmake_check_build_system] Error 1