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
@@ -1474,6 +1474,7 @@
                     checks=['check-flang'],
                     depends_on_projects=['llvm','mlir','clang','flang'],
                     extra_configure_args=[
+                        "-DLLVM_TARGETS_TO_BUILD=AArch64",
                         "-DLLVM_BUILD_LLVM_DYLIB=ON",
                         "-DLLVM_LINK_LLVM_DYLIB=ON",
                         "-DCMAKE_CXX_STANDARD=17",
@@ -1488,6 +1489,7 @@
                     checks=['check-flang'],
                     depends_on_projects=['llvm','mlir','clang','flang'],
                     extra_configure_args=[
+                        "-DLLVM_TARGETS_TO_BUILD=AArch64",
                         "-DBUILD_SHARED_LIBS=ON",
                         "-DLLVM_BUILD_EXAMPLES=ON",
                         "-DCMAKE_CXX_STANDARD=17",
@@ -1500,6 +1502,7 @@
     'factory' : FlangBuilder.getFlangOutOfTreeBuildFactory(
                     checks=['check-flang'],
                     llvm_extra_configure_args=[
+                        "-DLLVM_TARGETS_TO_BUILD=AArch64",
                         "-DCMAKE_CXX_STANDARD=17",
                         "-DLLVM_ENABLE_WERROR=OFF",
                         "-DLLVM_ENABLE_ASSERTIONS=ON",
@@ -1519,6 +1522,7 @@
                     checks=['check-flang'],
                     depends_on_projects=['llvm','mlir','clang','flang'],
                     extra_configure_args=[
+                        "-DLLVM_TARGETS_TO_BUILD=AArch64",
                         "-DCMAKE_BUILD_TYPE=Debug",
                         "-DCMAKE_CXX_STANDARD=17",
                         "-DLLVM_USE_LINKER=lld",
@@ -1533,6 +1537,7 @@
                     checks=['check-flang'],
                     depends_on_projects=['llvm','mlir','clang','flang'],
                     extra_configure_args=[
+                        "-DLLVM_TARGETS_TO_BUILD=AArch64",
                         "-DLLVM_INSTALL_UTILS=ON",
                         "-DCMAKE_CXX_STANDARD=17",
                         "-DLLVM_ENABLE_WERROR=OFF",
@@ -1552,6 +1557,7 @@
                     checks=['check-flang'],
                     depends_on_projects=['llvm','mlir','clang','flang'],
                     extra_configure_args=[
+                        "-DLLVM_TARGETS_TO_BUILD=AArch64",
                         "-DCMAKE_BUILD_TYPE=Release",
                         "-DCMAKE_CXX_STANDARD=17",
                     ])},
@@ -1565,6 +1571,7 @@
                     checks=['check-flang'],
                     depends_on_projects=['llvm','mlir','clang','flang'],
                     extra_configure_args=[
+                        "-DLLVM_TARGETS_TO_BUILD=AArch64",
                         "-DLLVM_ENABLE_ASSERTIONS=ON",
                         "-DCMAKE_BUILD_TYPE=Release",
                         "-DCMAKE_CXX_STANDARD=17",
@@ -1579,6 +1586,7 @@
                     checks=['check-flang'],
                     depends_on_projects=['llvm','mlir','clang','flang'],
                     extra_configure_args=[
+                        "-DLLVM_TARGETS_TO_BUILD=AArch64",
                         "-DLLVM_INSTALL_UTILS=ON",
                         "-DCMAKE_CXX_STANDARD=17",
                         "-DLLVM_ENABLE_WERROR=OFF",