diff --git a/builder/main.py b/builder/main.py
index bf33043..07a6bb0 100644
--- a/builder/main.py
+++ b/builder/main.py
@@ -256,6 +256,9 @@ env.Replace(
             if mcu in ("esp32c2", "esp32c3", "esp32c6")
             else "tool-xtensa-esp-elf-gdb"
         )
+        or "",
+        "bin",
+        "%s-elf-gdb" % toolchain_arch,
     ),
     OBJCOPY=join(platform.get_package_dir("tool-esptoolpy") or "", "esptool.py"),
     RANLIB="%s-elf-gcc-ranlib" % toolchain_arch,