CMake Warning (dev) at /nix/store/b6384n9wc85nvsvbx2xn4p18wajy1nyp-tomlplusplus-3.3.0/lib/cmake/tomlplusplus/tomlplusplusConfigVersion.cmake:45 (math):
  Unexpected character in expression at position 3: ,
  Unexpected character in expression at position 5: F
  Unexpected character in expression at position 6: a
  Unexpected character in expression at position 7: l
  Unexpected character in expression at position 8: s
  Unexpected character in expression at position 9: e

# check that the installed version has the same 32/64bit-ness as the one which is currently searching:
if(NOT CMAKE_SIZEOF_VOID_P STREQUAL "(8, False)")
  math(EXPR installedBits "(8, False) * 8")
  set(PACKAGE_VERSION "${PACKAGE_VERSION} (${installedBits}bit)")
  set(PACKAGE_VERSION_UNSUITABLE TRUE)
endif()