how to install luafilesystem
i am getting this error
root@OpenWrt:~/mqtt_lua/lua# luarocks install penlight
Installing https://luarocks.org/penlight-1.5.4-1.rockspec...
Using https://luarocks.org/penlight-1.5.4-1.rockspec... switching to 'build' mode
Missing dependencies for penlight:
luafilesystem
Using https://luarocks.org/luafilesystem-1.7.0-2.src.rock... switching to 'build' mode
gcc -O2 -fPIC -I/build/openwrt-18.06/slaves/phase2/x86_64/build/sdk/staging_dir/hostpkg/include -c src/lfs.c -o src/lfs.o
src/lfs.c:66:17: fatal error: lua.h: No such file or directory
compilation terminated.
Error: Failed installing dependency: https://luarocks.org/luafilesystem-1.7.0-2.src.rock - Build error: Failed compiling object src/lfs.o