Hello Edward, ED> The issue is not the links to directories. The issue is that there ED> are hardlinks to individual files in the boost subtree using the ED> logic of the current 'b2 headers' when run under Windows. This is a ED> problem because if the original file in the libs directory has been ED> changed, as for example via some 'pull' from Git, the corresponding ED> hardlink still points to the old file. So we have a mismatch which ED> causes errors in testing and Boost development. If you want to create symbolic links to files, open link.jam, locate there rule do-file-link and change the order of “if $(.can-symlink) = true” and “if $(.can-hardlink) = true”. It should look like this after the change: rule do-file-link { local target = [ path.native [ path.relative-to [ path.pwd ] $(<) ] ] ; local source = [ path.native [ path.relative-to [ path.pwd ] $(>) ] ] ; LOCATE on $(target) = . ; DEPENDS $(.current-target) : $(target) ; if $(.can-symlink) = true { link.mklink $(target) : $(source) ; } else if $(.can-hardlink) = true { DEPENDS $(target) : $(source) ; link.hardlink $(target) : $(source) ; } else { DEPENDS $(target) : $(source) ; common.copy $(target) : $(source) ; } } -- Vyacheslav Andrejev