i just switched from fedora to slackware and i love it.....but i cant install anything
when i run ./configure on anything i get this error message

checking wether build enviornment is sane... Configure: error: newly created file is older then distrobuted files
check your system clock

i reinstalled sane and i get the same thing....and i have no idea what it means about system clock

any info would be greatly appriciated....thnaks