diff -pruN fontconfig-2.12.91.orig/fc-cache/fc-cache.c fontconfig-2.12.91/fc-cache/fc-cache.c

--- fontconfig-2.12.91.orig/fc-cache/fc-cache.c	2017-11-20 21:02:20.000000000 +0900

+++ fontconfig-2.12.91/fc-cache/fc-cache.c	2017-12-14 16:59:19.002003145 +0900

@@ -413,7 +413,7 @@ main (int argc, char **argv)

      */

     /* the resolution of mtime on FAT is 2 seconds */

     if (changed)

-	sleep (2);

+	sleep (1);

     if (verbose)

 	printf ("%s: %s\n", argv[0], ret ? _("failed") : _("succeeded"));

     return ret;