diff --git a/programming/build/llvm/actions.py b/programming/build/llvm/actions.py
index a45bd72ba2..a5c170ff98 100644
--- a/programming/build/llvm/actions.py
+++ b/programming/build/llvm/actions.py
@@ -67,7 +67,7 @@ def setup():
     
     
     cmaketools.configure("-DCMAKE_BUILD_TYPE=Release \
-                          -G 'Unix Makefiles' \
+                          -G 'Ninja' \
                           %s \
                           -DLLVM_ENABLE_PROJECTS='%s' \
                           -DLLVM_LIBDIR_SUFFIX=%s \