diff --git a/support/download/cargo-post-process b/support/download/cargo-post-process
index 2d1c66661d..a4a4718a2a 100755
--- a/support/download/cargo-post-process
+++ b/support/download/cargo-post-process
@@ -22,7 +22,7 @@ post_process_unpack "${base_name}" "${output}"
 
 # Do the Cargo vendoring
 pushd "${base_name}" > /dev/null
-cargo vendor --locked VENDOR
+cargo vendor --manifest-path ${BR_CARGO_MANIFEST_PATH-Cargo.toml} --locked VENDOR
 
 # Create the local .cargo/config with vendor info
 mkdir -p .cargo/