Created attachment 1273 [details] v1.0 It appears that sourceforge has changed their download scheme for some packages (librsync at least). The new scheme is http://downloads.sourceforge.net/$PROJECT_PATH/$FILE_TO_DOWNLOAD?use_mirror=$MIRROR_NAME The attached patch lets the package optionally append a '?$($(PKG_SITE)_SITE_ARGS)' to the existing download url.
Thanks, but this isn't needed if the direct download URLS (like the other packages using sourceforge) is used. See package/haserl/haserl.mk for an example.