diff --git a/bouffalo-hal/src/sdio.rs b/bouffalo-hal/src/sdio.rs
index 3855e23..714d4db 100644
--- a/bouffalo-hal/src/sdio.rs
+++ b/bouffalo-hal/src/sdio.rs
@@ -380,7 +380,7 @@ impl Command {
     }
     /// Set this bit to 0 for the following:
     /// (1) Commands using only CMD line (ex.CMD52).
-    /// (2) Commands with no data transfer but using busy signal on DAT[0] line (R1b or R5b ex. CMD38).
+    /// (2) Commands with no data transfer but using busy signal on DAT\[0\] line (R1b or R5b ex. CMD38).
     /// (3) Resume command.
     #[inline]
     pub const fn unset_data_present(self) -> Self {
diff --git a/bouffalo-hal/src/uart/asynch.rs b/bouffalo-hal/src/uart/asynch.rs
index c7acc9c..93136eb 100644
--- a/bouffalo-hal/src/uart/asynch.rs
+++ b/bouffalo-hal/src/uart/asynch.rs
@@ -11,6 +11,7 @@ use core::{
 };
 
 /// Managed async/await serial peripheral.
+#[derive(Debug)]
 pub struct AsyncSerial<UART, PADS> {
     uart: UART,
     pads: PADS,
@@ -59,6 +60,7 @@ impl<UART: Deref<Target = RegisterBlock>, PADS> AsyncSerial<UART, PADS> {
 }
 
 /// Set of wakers as the state for an async/await serial peripheral.
+#[derive(Debug)]
 pub struct SerialState {
     transmit_ready: atomic_waker::AtomicWaker,
     receive_ready: atomic_waker::AtomicWaker,
diff --git a/bouffalo-rt/Cargo.toml b/bouffalo-rt/Cargo.toml
index 1ddfa16..85c2322 100644
--- a/bouffalo-rt/Cargo.toml
+++ b/bouffalo-rt/Cargo.toml
@@ -12,7 +12,7 @@ crc = "3.2.1"
 cfg-if = "1.0.0"
 embedded-time = "0.12.1"
 plic = "0.0.2"
-xuantie-riscv = { git = "https://github.com/rustsbi/xuantie", commit = "fe7ec712" }
+xuantie-riscv = { git = "https://github.com/rustsbi/xuantie", rev = "fe7ec712" }
 
 [dev-dependencies]
 memoffset = "0.9.1"
diff --git a/examples/peripherals/uart-async-demo/src/main.rs b/examples/peripherals/uart-async-demo/src/main.rs
index 4adbc3e..e25b43f 100644
--- a/examples/peripherals/uart-async-demo/src/main.rs
+++ b/examples/peripherals/uart-async-demo/src/main.rs
@@ -1,4 +1,3 @@
-#![feature(noop_waker)]
 #![no_std]
 #![no_main]