Try using rustup in rustler

Author: RoyalIcing

lib/components_guide/rustler/math.ex

@@ -1,5 +1,6 @@
 defmodule ComponentsGuide.Rustler.Math do
-  use Rustler, otp_app: :components_guide, crate: :componentsguide_rustler_math
+  # use Rustler, otp_app: :components_guide, crate: :componentsguide_rustler_math
+  use Rustler, otp_app: :components_guide, crate: :componentsguide_rustler_math, cargo: {:rustup, :stable}
 
   def add(_, _), do: error()