When building my site, there is an error:

$ rebuilding Ikiwiki instance...
generating wrappers..
/Users/computist/mysite/.git/hooks/post-commit.c:116:7: warning: 'daemon' is deprecated: first deprecated in macOS 10.5 - Use posix_spawn APIs instead. [-Wdeprecated-declarations]
  116 |                 if (daemon(1, 0) == 0) {
      |                     ^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/_stdlib.h:319:6: note: 'daemon' has been explicitly marked deprecated here
  319 | int      daemon(int, int) __DARWIN_1050(daemon) __OSX_AVAILABLE_BUT_DEPRECATED_MSG(__MAC_10_0, __MAC_10_5, __IPHONE_2_0, __IPHONE_2_0, "Use posix_spawn APIs instead.") __WATCHOS_PROHIBITED __TVOS_PROHIBITED;
      |          ^
1 warning generated.
rebuilding wiki..

Any idea how to fix it?