This may take a while
ftp://ftp.proxad.net/mirrors/fedora.redhat.com/fedora/linux/core/development/x86_64/os/Fedora/repodata/repomd.xml: [Errno 14] HTTP Error 503: Server: squid/2.6.STABLE9
Date: Fri, 16 Mar 2007 20:26:51 GMT
Content-Type: text/html
Content-Length: 1485
Expires: Fri, 16 Mar 2007 20:26:51 GMT
X-Squid-Error: ERR_CANNOT_FORWARD 11
X-Cache: MISS from 192.168.5.10
X-Cache-Lookup: MISS from 192.168.5.10:3128
Via: 1.0 192.168.5.10:3128 (squid/2.6.STABLE9)
Proxy-Connection: close

Trying other mirror.
Error: Cannot open/read repomd.xml file for repository: core

Error performing yum command: /usr/sbin/mock-helper yum --installroot /var/lib/mock/fedora-development-x86_64-core/root install buildsys-build