diff --git a/scripts/generate_reports.py b/scripts/generate_reports.py
index 4c0c911..b9100f4 100644
--- a/scripts/generate_reports.py
+++ b/scripts/generate_reports.py
@@ -192,12 +192,14 @@ def _generate_all_domains(interval: str) -> None:
 def _generate_root_index() -> None:
     """Render the top-level index listing all intervals and domains."""
     _copy_icons()
-    intervals = [
-        p.name
-        for p in OUTPUT_DIR.iterdir()
-        if p.is_dir() and p.name.lower() not in {"domains", "global", "analysis"}
-    ]
-    intervals.sort()
+    intervals = sorted(
+        [
+            name
+            for name in INTERVAL_FORMATS
+            if (OUTPUT_DIR / name).is_dir()
+        ]
+    )
+
 
     domains_dir = OUTPUT_DIR / "domains"
     domains: List[str] = []