Boost locale normalize strips characters but no accents

I am trying to strip accents from a string using the boost local library.

The normalize function removes the entire character with the accent, i only want to remove the accent.

è -> e for example

Here is my code

std::string hello(u8"élève");
boost::locale::generator gen;
std::string str = boost::locale::normalize(hello,boost::locale::norm_nfd,gen(""));

Desired ouput : eleve

My Output : lve

Help please