diff --git a/tools/build/build.py b/tools/build/build.py
index ec3cc568..0d6e0f3b 100755
--- a/tools/build/build.py
+++ b/tools/build/build.py
@@ -92,13 +92,15 @@ def build_oxjs(downloads=False, geo=False):
 
     # copy & link
     ui_files = {'dev': [], 'min': []}
+    css_files = ['maplibre-gl.css']
     for path, dirnames, filenames in os.walk(source_path):
         for filename in filenames:
             if '_' not in path and filename[0] not in '._' \
                     and not filename.endswith('~') \
-                    and not filename.endswith('.css') \
                     and '/UI/svg' not in path \
                     and (geo or '/Geo/' not in path):
+                if filename.endswith('.css') and filename not in css_files:
+                    continue
                 # write copies in min path
                 source = os.path.join(path, filename)
                 is_jquery = re.search(r'^jquery-[\d\.]+\.js$', filename)