Change crate name to libtock.
diff --git a/examples/button_subscribe.rs b/examples/button_subscribe.rs
index 0b8fb23..6644e8d 100644
--- a/examples/button_subscribe.rs
+++ b/examples/button_subscribe.rs
@@ -1,11 +1,11 @@
#![no_std]
use core::fmt::Write;
-use tock::buttons;
-use tock::buttons::ButtonState;
-use tock::console::Console;
-use tock::timer;
-use tock::timer::Duration;
+use libtock::buttons;
+use libtock::buttons::ButtonState;
+use libtock::console::Console;
+use libtock::timer;
+use libtock::timer::Duration;
// FIXME: Hangs up when buttons are pressed rapidly - problem in console?
fn main() {
