安装libxml2包出错

Question

在Solaris 8下安装libxml2-2.6.31.tar.gz包 (download from www.sunfreeware.com)

./configure

checking build system type..... sparc-sun-solaris2.8
checking host system type......sparc-sun-soaris2.8
checking for a BSD-compatible install......../install-sh -c
checking whether build environment is sane..... configure: error: ls -t appears to fail. Make sure there is not a broken
alias in your environment
configure: error: newly created file is older than distributed files!
check your system clock

出现此错误信息可能原因在哪里，请各位大侠帮忙指点，
小女子不胜感激！！