diff --git a/rust-toolchain b/rust-toolchain
new file mode 100644
index 0000000000000..96d21cf60ecfc
--- /dev/null
+++ b/rust-toolchain
@@ -0,0 +1,5 @@
+[toolchain]
+# not just `beta`, since during release week there are two different beta compilers
+channel = "beta-2022-02-22"
+components = ["rustfmt"]
+profile = "minimal"