AppVeyor: retry download

diff --git a/.appveyor.yml b/.appveyor.yml
index 4e8b8cd4b898b88233486e8005690d681f7c5ead..391ff042daf41d8a24255a84cdcbea600e9358d3 100644 (file)
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -18,7 +18,7 @@ cache:
 
 install:
     # Install Rust
-    - curl -sSf -o rustup-init.exe https://win.rustup.rs/
+    - curl -sSf --retry 3 -o rustup-init.exe https://win.rustup.rs/
     - rustup-init.exe -y --default-host %TARGET% --default-toolchain stable
     - set PATH=%USERPROFILE%\.cargo\bin;%PATH%
     # Install "master" toolchain