Stupid yum workaround, attempt #1.
    
    yum.Errors.ConfigError: Parsing file failed: File contains parsing errors: file:///builddir/build/BUILD/libguestfs-1.21.26/yum.conf
                            [line  2]:     cachedir=/var/cache/yum
                            [line  3]:     debuglevel=1
                            [line  4]:     logfile=/var/log/yum.log
                            [line  5]:     retries=20
                            [line  6]:     obsoletes=1
                            [line  7]:     gpgcheck=0
                            [line  8]:     assumeyes=1
                            [line  9]:     reposdir=/dev/null
                            [line 11]:     name=local
                            [line 12]:     baseurl=file:///builddir/build/BUILD/libguestfs-1.21.26/repo
                            [line 13]:     failovermethod=priority
                            [line 14]:     enabled=1
                            [line 15]:     gpgcheck=0