diff --git a/codex-rs/core/src/unified_exec/process_manager.rs b/codex-rs/core/src/unified_exec/process_manager.rs
index c2c9e42c5f..8341182e8b 100644
--- a/codex-rs/core/src/unified_exec/process_manager.rs
+++ b/codex-rs/core/src/unified_exec/process_manager.rs
@@ -651,12 +651,12 @@ impl UnifiedExecProcessManager {
         params: codex_exec_server::ExecParams,
         environment: &codex_exec_server::Environment,
     ) -> Result<UnifiedExecProcess, UnifiedExecError> {
+        let sandbox_type = params.sandbox.sandbox;
         let started = environment
             .get_exec_backend()
             .start(params)
             .await
             .map_err(|err| UnifiedExecError::create_process(err.to_string()))?;
-        let sandbox_type = started.sandbox_type;
         UnifiedExecProcess::from_remote_started(started, sandbox_type).await
     }