diff --git a/embassy-embedded-hal/src/lib.rs b/embassy-embedded-hal/src/lib.rs
index ee964e404..f836d9f76 100644
--- a/embassy-embedded-hal/src/lib.rs
+++ b/embassy-embedded-hal/src/lib.rs
@@ -1,5 +1,6 @@
 #![cfg_attr(not(feature = "std"), no_std)]
-#![cfg_attr(feature = "nightly", feature(async_fn_in_trait, try_blocks))]
+#![cfg_attr(feature = "nightly", feature(async_fn_in_trait, impl_trait_projections, try_blocks))]
+#![cfg_attr(feature = "nightly", allow(stable_features, unknown_lints, async_fn_in_trait))]
 #![warn(missing_docs)]
 
 //! Utilities to use `embedded-hal` traits with Embassy.
diff --git a/embassy-lora/src/lib.rs b/embassy-lora/src/lib.rs
index 5637802bb..653c98253 100644
--- a/embassy-lora/src/lib.rs
+++ b/embassy-lora/src/lib.rs
@@ -1,5 +1,6 @@
 #![no_std]
-#![feature(async_fn_in_trait)]
+#![feature(async_fn_in_trait, impl_trait_projections)]
+#![allow(stable_features, unknown_lints, async_fn_in_trait)]
 //! embassy-lora holds LoRa-specific functionality.
 
 pub(crate) mod fmt;
diff --git a/embassy-net/src/lib.rs b/embassy-net/src/lib.rs
index 798962875..b9315079a 100644
--- a/embassy-net/src/lib.rs
+++ b/embassy-net/src/lib.rs
@@ -1,5 +1,6 @@
 #![cfg_attr(not(feature = "std"), no_std)]
-#![cfg_attr(feature = "nightly", feature(async_fn_in_trait))]
+#![cfg_attr(feature = "nightly", feature(async_fn_in_trait, impl_trait_projections))]
+#![cfg_attr(feature = "nightly", allow(stable_features, unknown_lints, async_fn_in_trait))]
 #![warn(missing_docs)]
 #![doc = include_str!("../README.md")]
 
diff --git a/embassy-nrf/src/lib.rs b/embassy-nrf/src/lib.rs
index 2cc83d745..715281119 100644
--- a/embassy-nrf/src/lib.rs
+++ b/embassy-nrf/src/lib.rs
@@ -1,5 +1,6 @@
 #![no_std]
-#![cfg_attr(feature = "nightly", feature(async_fn_in_trait))]
+#![cfg_attr(feature = "nightly", feature(async_fn_in_trait, impl_trait_projections))]
+#![cfg_attr(feature = "nightly", allow(stable_features, unknown_lints, async_fn_in_trait))]
 #![doc = include_str!("../README.md")]
 #![warn(missing_docs)]
 
diff --git a/embassy-rp/src/lib.rs b/embassy-rp/src/lib.rs
index 2728395b2..c9fe89b8c 100644
--- a/embassy-rp/src/lib.rs
+++ b/embassy-rp/src/lib.rs
@@ -1,5 +1,6 @@
 #![no_std]
-#![cfg_attr(feature = "nightly", feature(async_fn_in_trait))]
+#![cfg_attr(feature = "nightly", feature(async_fn_in_trait, impl_trait_projections))]
+#![cfg_attr(feature = "nightly", allow(stable_features, unknown_lints, async_fn_in_trait))]
 
 // This mod MUST go first, so that the others see its macros.
 pub(crate) mod fmt;
diff --git a/embassy-stm32/src/lib.rs b/embassy-stm32/src/lib.rs
index 5c7067d2d..23d42bae8 100644
--- a/embassy-stm32/src/lib.rs
+++ b/embassy-stm32/src/lib.rs
@@ -1,5 +1,6 @@
 #![cfg_attr(not(test), no_std)]
-#![cfg_attr(feature = "nightly", feature(async_fn_in_trait))]
+#![cfg_attr(feature = "nightly", feature(async_fn_in_trait, impl_trait_projections))]
+#![cfg_attr(feature = "nightly", allow(stable_features, unknown_lints, async_fn_in_trait))]
 
 //! ## Feature flags
 #![doc = document_features::document_features!(feature_label = r#"<span class="stab portability"><code>{feature}</code></span>"#)]
diff --git a/embassy-sync/src/lib.rs b/embassy-sync/src/lib.rs
index aca6ff38f..c40fa3b6a 100644
--- a/embassy-sync/src/lib.rs
+++ b/embassy-sync/src/lib.rs
@@ -1,5 +1,6 @@
 #![cfg_attr(not(any(feature = "std", feature = "wasm")), no_std)]
-#![cfg_attr(feature = "nightly", feature(async_fn_in_trait))]
+#![cfg_attr(feature = "nightly", feature(async_fn_in_trait, impl_trait_projections))]
+#![cfg_attr(feature = "nightly", allow(stable_features, unknown_lints, async_fn_in_trait))]
 #![allow(clippy::new_without_default)]
 #![doc = include_str!("../README.md")]
 #![warn(missing_docs)]
diff --git a/examples/std/src/bin/net_ppp.rs b/examples/std/src/bin/net_ppp.rs
index 9ea07b29a..6ac31f2f3 100644
--- a/examples/std/src/bin/net_ppp.rs
+++ b/examples/std/src/bin/net_ppp.rs
@@ -8,7 +8,8 @@
 //!     nc 192.168.7.10 1234
 
 #![feature(type_alias_impl_trait)]
-#![feature(async_fn_in_trait)]
+#![feature(async_fn_in_trait, impl_trait_projections)]
+#![allow(stable_features, unknown_lints, async_fn_in_trait)]
 
 #[path = "../serial_port.rs"]
 mod serial_port;