Use ValueError, not RuntimeError for a utime flag combination illegal on some systems.
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 8f2bbfb..82626a8 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -4667,7 +4667,7 @@
 
 #if !defined(HAVE_UTIMENSAT)
     if ((dir_fd != DEFAULT_DIR_FD) && (!follow_symlinks)) {
-        PyErr_SetString(PyExc_RuntimeError,
+        PyErr_SetString(PyExc_ValueError,
                      "utime: cannot use dir_fd and follow_symlinks "
                      "together on this platform");
         goto exit;