我按照此链接中提到的所有说明操作：http://free-electrons.com/doc/training/buildroot/buildroot-labs.pdf 但是当我跑步时：
make
我收到了这些消息错误：
>>> linux Downloading
/linux-.tar.xz: Scheme missing.
--2015-08-10 09:19:10-- http://sources.buildroot.net/linux-.tar.xz
Resolving sources.buildroot.net (sources.buildroot.net)... 176.9.16.109
Connecting to sources.buildroot.net (sources.buildroot.net)|176.9.16.109|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2015-08-10 09:19:10 ERROR 404: Not Found.
make: *** [/home/slim/Downloads/buildroot/output/build/linux-/.stamp_downloaded] Error 1