diff --git a/buildbot/osuosl/master/config/builders.py b/buildbot/osuosl/master/config/builders.py
--- a/buildbot/osuosl/master/config/builders.py
+++ b/buildbot/osuosl/master/config/builders.py
@@ -2377,6 +2377,7 @@
                     clean=False,
                     timeout=1800,
                     checkout_lld=False,
+                    enable_runtimes=None,
                     extra_cmake_args=['-DLLVM_ENABLE_ASSERTIONS=ON',
                                     '-DLLVM_TARGETS_TO_BUILD=X86',
                                     '-DLLVM_HOST_TRIPLE=amd64-pc-solaris2.11',
@@ -2391,6 +2392,7 @@
                     clean=False,
                     timeout=1800,
                     checkout_lld=False,
+                    enable_runtimes=None,
                     extra_cmake_args=['-DLLVM_ENABLE_ASSERTIONS=ON',
                                     '-DLLVM_TARGETS_TO_BUILD=Sparc',
                                     '-DLLVM_HOST_TRIPLE=sparcv9-sun-solaris2.11',