Switch rust compiler before installing rustup components.

servo · jdm · Oct 29, 2019 · Oct 29, 2019 · 4d124ef9c3d16cdeca919301200ab8a1967b3463
commit 4d124ef9c3d16cdeca919301200ab8a1967b3463
diff --git a/etc/taskcluster/decision_task.py b/etc/taskcluster/decision_task.py
@@ -269,8 +269,8 @@ def with_rust_nightly():
     return (
         linux_build_task("with Rust Nightly", build_env=modified_build_env)
         .with_treeherder("Linux x64", "RustNightly")
+        .with_early_script('echo "nightly" > rust-toolchain')
         .with_script("""
-            echo "nightly" > rust-toolchain
             ./mach build --dev
             ./mach test-unit
         """)