const golang.org/x/sys/unix.ATTR_FILE_FORKCOUNT

one use

	golang.org/x/sys/unix (current package)
		zerrors_darwin_arm64.go#L97: 	ATTR_FILE_FORKCOUNT               = 0x80

The pages are generated with Golds v0.2.8-preview. (GOOS=darwin GOARCH=arm64)