diff --git a/appveyor.yml b/appveyor.yml
index 9e9ae34..5dfbf5d 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -7,7 +7,7 @@ environment:
 install:
   - ps: Start-FileDownload "https://static.rust-lang.org/dist/channel-rust-stable"
   - ps: $env:RUST_VERSION = Get-Content channel-rust-stable | select -first 1 | %{$_.split('-')[1]}
-  - SET RUST_URL=https://static.rust-lang.org/dist/rust-${env:RUST_VERSION}-${env:TARGET}.exe
+  - SET RUST_URL=https://static.rust-lang.org/dist/rust-%RUST_VERSION%-%TARGET%.exe
   - SET PATH=C:\Rust\bin;C:\msys64\mingw64\bin;%PATH%;C:\msys64\usr\bin
   - ps: Start-FileDownload $env:RUST_URL -FileName rust-dist.exe
   - rust-dist.exe /VERYSILENT /NORESTART /COMPONENTS="Rustc,Gcc,Cargo,Std" /DIR="C:\Rust"