adjacency_list.hpp and max_cardinality_matching.hpp in graph submodule includes nonexistent files

[spism]

As the title says, I am having trouble with the two mentioned files adjacency_list.hpp and max_cardinality_matching.hpp, namely with certain includes (I am listing examples from adjacency_list.hpp):
#include <boost/unordered_set.hpp>
and
#include <boost/unordered_set.hpp>.

Were these excluded from the library at some point/what can I do to remedy this?