if test "x$prefix" = "xNONE" ; then
case "$cf_cv_system_name" in
# non-vendor systems don't have a conflict
- openbsd*|freebsd*|mirbsd*|linux*|cygwin*|k*bsd*-gnu)
+ openbsd*|freebsd*|mirbsd*|linux*|cygwin*|k*bsd*-gnu|mingw*)
prefix=/usr
;;
*) prefix=$ac_default_prefix