diff --git a/python/protocan/native.py b/python/protocan/native.py
index acc3758..40c8f11 100644
--- a/python/protocan/native.py
+++ b/python/protocan/native.py
@@ -67,7 +67,9 @@ def _library_candidates() -> Iterable[Path | str]:
         # One-release fallback for already packaged SETCore binaries.
         "setcore.dll", "libsetcore.so", "libsetcore.dylib",
     )
-    for parent in (here.parent, *here.parents[:5]):
+    # Python 3.8 (used by the Windows 7 build) does not support slicing
+    # Path.parents directly. Convert the sequence before taking the slice.
+    for parent in (here.parent, *tuple(here.parents)[:5]):
         for name in names:
             yield parent / "native" / name
             yield parent / name