Index: buildbot/osuosl/master/config/builders.py
===================================================================
--- buildbot/osuosl/master/config/builders.py
+++ buildbot/osuosl/master/config/builders.py
@@ -905,6 +905,14 @@
                                'LIBCXXABI_ENABLE_THREADS': 'OFF'}),
          'category': 'libcxx'},
 
+        {'name': 'libcxx-libcxxabi-no_global_filesystem_namespace-x86_64-linux-debian',
+         'slavenames': ['gribozavr4'],
+         'builddir': 'libcxx-libcxxabi-no_global_filesystem_namespace-x86_64-linux-debian',
+         'factory': LibcxxAndAbiBuilder.getLibcxxAndAbiBuilder(
+             env={'CC': 'clang', 'CXX': 'clang++'},
+             cmake_extra_opts={'LIBCXX_ENABLE_GLOBAL_FILESYSTEM_NAMESPACE': 'OFF'}),
+         'category': 'libcxx'},
+
         # EricWF's builders on ericwf-buildslave
         {'name': 'libcxx-libcxxabi-x86_64-linux-ubuntu',
          'slavenames': ['ericwf-buildslave'],