diff --git a/micropip/_compat_not_in_pyodide.py b/micropip/_compat_not_in_pyodide.py
index 892fef1..1da81f4 100644
--- a/micropip/_compat_not_in_pyodide.py
+++ b/micropip/_compat_not_in_pyodide.py
@@ -95,9 +95,7 @@ def wheel_dist_info_dir(source: ZipFile, name: str) -> str:
     canonical_name = canonicalize_name(name)
     if not info_dir_name.startswith(canonical_name):
         raise UnsupportedWheel(
-            ".dist-info directory {!r} does not start with {!r}".format(
-                info_dir, canonical_name
-            )
+            f".dist-info directory {info_dir!r} does not start with {canonical_name!r}"
         )
 
     return info_dir