diff --git a/libcxx/utils/ci/run-buildbot b/libcxx/utils/ci/run-buildbot
--- a/libcxx/utils/ci/run-buildbot
+++ b/libcxx/utils/ci/run-buildbot
@@ -115,8 +115,8 @@
 
 function generate-cmake-aix() {
     generate-cmake-base \
-          -S "${MONOREPO_ROOT}/llvm" \
-          -DLLVM_ENABLE_PROJECTS="libcxx;libcxxabi" \
+          -S "${MONOREPO_ROOT}/runtimes" \
+          -DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi" \
           "${@}"
 }