pkgsrc/www/firefox sys/auxv.h: No such file or directory

[ebijun]

/mnt/aarch64/pkgsrc/www/firefox/work.aarch64/build/dist/system_wrappers/sys/auxv.h:3:15:
fatal error: sys/auxv.h: No such file or directory^M
#include_next <sys/auxv.h>^M