diff --git a/.clang-format b/.clang-format
index 5e7d4ec..7bf7ac8 100644
--- a/.clang-format
+++ b/.clang-format
@@ -81,22 +81,12 @@ IfMacros:
   - KJ_IF_MAYBE
 IncludeBlocks:   Regroup
 IncludeCategories:
-  - Regex:           '^<ext/.*\.h>'
-    Priority:        2
-    SortPriority:    0
-    CaseSensitive:   false
-  - Regex:           '^<.*\.h>'
+  - Regex:           '^<sys/.*\.h>$'
     Priority:        1
-    SortPriority:    0
-    CaseSensitive:   false
-  - Regex:           '^<.*'
+  - Regex:           '^<.*\.h>$'
     Priority:        2
-    SortPriority:    0
-    CaseSensitive:   false
   - Regex:           '.*'
     Priority:        3
-    SortPriority:    0
-    CaseSensitive:   false
 IncludeIsMainRegex: '([-_](test|unittest))?$'
 IncludeIsMainSourceRegex: ''
 IndentAccessModifiers: false