netcat.c:817:14: error: call to undeclared function 'accept4'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  817 |                                 connfd = accept4(s, (struct sockaddr *)&cliaddr,
      |                                          ^
netcat.c:817:14: note: did you mean 'accept'?
/nix/store/8f25drv3142v3pijkqyx03gags0rscw0-apple-sdk-11.3/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/socket.h:700:9: note: 'accept' declared here
  700 | int     accept(int, struct sockaddr * __restrict, socklen_t * __restrict)
      |         ^
netcat.c:818:15: error: use of undeclared identifier 'SOCK_NONBLOCK'
  818 |                                     &len, SOCK_NONBLOCK);
      |                                           ^~~~~~~~~~~~~
netcat.c:1152:42: error: use of undeclared identifier 'SOCK_CLOEXEC'
 1152 |                 if ((s = unix_bind(unix_dg_tmp_socket, SOCK_CLOEXEC)) == -1)
      |                                                        ^~~~~~~~~~~~
netcat.c:1155:42: error: use of undeclared identifier 'SOCK_CLOEXEC'
 1155 |                 if ((s = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0)) == -1)
      |                                                        ^~~~~~~~~~~~
netcat.c:1222:7: error: use of undeclared identifier 'SOCK_NONBLOCK'
 1222 |                     SOCK_NONBLOCK, res->ai_protocol)) == -1)
      |                     ^~~~~~~~~~~~~
netcat.c:2102:17: error: use of undeclared identifier 'IPTOS_LOWCOST'
 2102 |                 { "lowcost",            IPTOS_LOWCOST },
      |                                         ^~~~~~~~~~~~~

  bindgenHook = makeSetupHook {
    name = "rust-bindgen-hook";
    substitutions = {
      libclang = (lib.getLib clang.cc);
      inherit clang;
    };
  } ./rust-bindgen-hook.sh;