diff --git a/prebuilt_hashes/dump_hals_for_release.py b/prebuilt_hashes/dump_hals_for_release.py
index fee12ab..e9ed4c2 100755
--- a/prebuilt_hashes/dump_hals_for_release.py
+++ b/prebuilt_hashes/dump_hals_for_release.py
@@ -32,7 +32,7 @@
 
 class Constants:
     CURRENT = 'current'
-    HAL_PATH_PATTERN = r'/((?:[a-zA-Z_]+/)*)(\d+\.\d+)/([a-zA-Z_]+).hal'
+    HAL_PATH_PATTERN = r'/((?:[a-zA-Z_][a-zA-Z0-9_]*/)*)(\d+\.\d+)/([a-zA-Z_][a-zA-Z0-9_]*).hal'
     CURRENT_TXT_PATTERN = r'(?:.*/)?([0-9]+|current).txt'
 
 def trim_trailing_comments(line):