diff --git a/rust-toolchain b/rust-toolchain
index bf867e0..a0d6ea9 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1,4 @@
-nightly
+[toolchain]
+channel = "nightly"
+components = ["clippy", "llvm-tools-preview", "rust-src", "rustfmt"]
+targets = ["aarch64-unknown-none-softfloat"]