Updated to revision 5089.
Checking 'working-make'... ok.
Checking 'case-sensitive-fs'... failed.
Checking 'working-gcc'... ok.
Checking 'working-g++'... ok.
Checking 'ncurses'... ok.
Checking 'zlib'... ok.
Checking 'bison'... ok.
Checking 'flex'... ok.
Checking 'python'... ok.
Checking 'unzip'... ok.
Checking 'bzip2'... ok.
Checking 'patch'... ok.
Checking 'perl'... ok.
Checking 'wget'... ok.
Checking 'gnutar'... ok.
Checking 'non-root'... ok.

OpenWrt can only be built on a case-sensitive filesystem

Prerequisite check failed. Use FORCE=1 to override.
make: *** [.prereq-build] Error 1