In the 1.34.x release series Fusion was a semi-official part of Spirit and was
found under boost/spirit/fusion.

Thanks for responding. I noticed that there is no <fusion/container/vector.hpp> in Spirit's version of fusion. I use this container fairly extensively in my project. Am I unable to have access to this container if I'm not using boost version 1.35? Perhaps it is just named differently in the spirit fusion?