The following error occurs pip installing 0.4.10. pip install vmprof==0.4.9 succeeds

/usr/bin/clang -bundle -undefined dynamic_lookup -arch i386 -arch x86_64 -g build/temp.macosx-10.6-intel-3.6/src/_vmprof.o build/temp.macosx-10.6-intel-3.6/src/machine.o build/temp.macosx-10.6-intel-3.6/src/compat.o build/temp.macosx-10.6-intel-3.6/src/vmp_stack.o build/temp.macosx-10.6-intel-3.6/src/vmprof_common.o build/temp.macosx-10.6-intel-3.6/src/vmprof_memory.o build/temp.macosx-10.6-intel-3.6/src/symboltable.o build/temp.macosx-10.6-intel-3.6/src/vmprof_unix.o build/temp.macosx-10.6-intel-3.6/src/vmprof_mt.o -o build/lib.macosx-10.6-intel-3.6/_vmprof.cpython-36m-darwin.so
duplicate symbol __PyThreadState_Current in:
build/temp.macosx-10.6-intel-3.6/src/_vmprof.o
build/temp.macosx-10.6-intel-3.6/src/vmprof_common.o
duplicate symbol __PyThreadState_Current in:
build/temp.macosx-10.6-intel-3.6/src/_vmprof.o
build/temp.macosx-10.6-intel-3.6/src/vmprof_unix.o
ld: 2 duplicate symbols for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
error: command '/usr/bin/clang' failed with exit status 1