diff --git a/src/backend/github.rs b/src/backend/github.rs
index 6674f3874f..855d4728c1 100644
--- a/src/backend/github.rs
+++ b/src/backend/github.rs
@@ -254,7 +254,7 @@ impl Backend for UnifiedGitBackend {
             .config
             .get_tool_opts(&self.ba)
             .await?
-            .unwrap_or_else(|| tv.request.options());
+            .unwrap_or_else(|| self.ba.opts());
         let api_url = self.get_api_url(&opts);
 
         // Check if URL already exists in lockfile platforms first
diff --git a/src/registry.rs b/src/registry.rs
index 57965aef37..0b9c481390 100644
--- a/src/registry.rs
+++ b/src/registry.rs
@@ -131,7 +131,13 @@ impl RegistryTool {
 
         if let Some(backend) = self.get_backend(full) {
             for (k, v) in backend.options {
-                opts.insert(k.to_string(), toml::Value::String(v.to_string()));
+                // Try to parse as TOML to preserve nested table structure
+                // (e.g., platforms with per-platform options like asset_pattern)
+                let value = match toml::from_str::<toml::Value>(v) {
+                    Ok(parsed) if parsed.is_table() => parsed,
+                    _ => toml::Value::String(v.to_string()),
+                };
+                opts.insert(k.to_string(), value);
             }
         }