fix prior commit

src/install/mod.rs

@@ -173,7 +173,8 @@ fn prebuilt_url(tool: &Tool, version: &str) -> Result<String> {
 /// Get the download URL for some tool at some version, architecture and operating system
 pub fn prebuilt_url_for(tool: &Tool, version: &str, arch: &Arch, os: &Os) -> Result<String> {
     let target = match (os, arch, tool) {
-        (Os::Linux, Arch:AArch64, Tool::WasmOpt) => "aarch64-linux",
+        (Os::Linux, Arch::AArch64, Tool::WasmOpt) => "aarch64-linux",
+        (Os::Linux, Arch::AArch64, _) => "aarch64-unknown-linux-musl",
         (Os::Linux, Arch::X86_64, Tool::WasmOpt) => "x86_64-linux",
         (Os::Linux, Arch::X86_64, _) => "x86_64-unknown-linux-musl",
         (Os::MacOS, Arch::X86_64, Tool::WasmOpt) => "x86_64-macos",