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export USE_MASTER = ""
-export CENTDNLD = http://mirrors.cat.pdx.edu/centos/7.3.1611/isos/x86_64/CentOS-7-x86_64-DVD-1611.iso
+export CENTDNLD = http://mirrors.cat.pdx.edu/centos/7.4.1708/isos/x86_64/CentOS-7-x86_64-DVD-1708.iso
export RELEASE = "0"
export RPM_DIST = $(shell rpm -E %dist)