As I reported in bug #143819 causes boost-jam blocking circular dependencies, breaks the update of dev-libs/boost, breaks the installation of boost when the bjam USE-flag has been specified for boost (overwrites bjam provided by boost). While some of the issues might be solved, the blocking circular dep can't be and since it's functionality can be replaced by dev-libs/boost with the bjam USE-flag and since only one package (dev-python/pythonmagick) depends on it, which is broken too and for which the newer version uses scons instead of boost-jam anyway, I'm asking to p.mask this package and remove it after dev-python/pythonmagick has been either removed or updated.
As soon as this package has been removed, the blocking the dep in dev-util/jam should be removed as well.
*** Bug 146899 has been marked as a duplicate of this bug. ***
Package has been removed.