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
@@ -1492,8 +1492,6 @@
                         "-DLLVM_ENABLE_LIBCXX=On",
                         "-DFLANG_BUILD_NEW_DRIVER=ON",
                         "-DCMAKE_BUILD_TYPE=Release",
-                        "-DCMAKE_C_COMPILER=/usr/bin/clang",
-                        "-DCMAKE_CXX_COMPILER=/usr/bin/clang++",
                         ])},
 
     {'name' : "flang-aarch64-ubuntu-release",
@@ -1537,8 +1535,6 @@
                     depends_on_projects=['llvm','mlir','clang','flang'],
                     extra_configure_args=[
                         "-DLLVM_TARGETS_TO_BUILD=AArch64",
-                        "-DCMAKE_C_COMPILER=/usr/bin/gcc",
-                        "-DCMAKE_CXX_COMPILER=/usr/bin/g++",
                         "-DLLVM_INSTALL_UTILS=ON",
                         "-DCMAKE_CXX_STANDARD=17",
                         "-DLLVM_ENABLE_WERROR=OFF",