# Pastebin YRD7iZHp
$ zig c++ -c test.c -o test -target x86_64-macosx
In file included from test.c:1:
/nix/store/vzac4lx7s9bnvzq8j0r9gwacqrfbydzl-zig-cfedd3a/lib/zig/libcxx/include/string.h:60:15: fatal error: 'string.h' file not found
#include_next <string.h>