fix: point pack guides at the path each platform reads

scripts/generate_pack.py

@@ -1110,6 +1110,12 @@ def generate_pack(
           undecidable_slots=slot_undecidable,
           narrowings=narrowings,
           system_filter=system_filter,
+          bios_paths=[
+              str(detect.get("bios_path", ""))
+              for detect in (
+                  _pack_registry.get(platform_name, {}).get("install", {}) or {}
+              ).get("detect", [])
+          ],
       )
       _write_generated_member(zf, "README.txt", readme_text)