yum clean all yumdownloader --source numpy Trying other mirror. http://mirror.cc.vt.edu/pub/fedora/linux/updates/11/SRPMS/numpy-1.2.0-2.fc10.src.rpm: [Errno 14] HTTP Error 404: Not Found ... Of course it isn't found. rpm -q numpy numpy-1.3.0-4.fc11.x86_64