diff --git a/libcxx/utils/ci/buildkite-pipeline.yml b/libcxx/utils/ci/buildkite-pipeline.yml
--- a/libcxx/utils/ci/buildkite-pipeline.yml
+++ b/libcxx/utils/ci/buildkite-pipeline.yml
@@ -562,7 +562,7 @@
 
   # Build with the configuration we use to generate libc++.dylib on Apple platforms
   - label: "Apple system"
-    command: "libcxx/utils/ci/run-buildbot x86_64-apple-system"
+    command: "libcxx/utils/ci/run-buildbot apple-system"
     artifact_paths:
       - "**/test-results.xml"
     agents:
@@ -576,7 +576,7 @@
 
   # Test back-deployment to older Apple platforms
   - label: "Apple back-deployment macosx10.9"
-    command: "libcxx/utils/ci/run-buildbot x86_64-apple-system-backdeployment-10.9"
+    command: "libcxx/utils/ci/run-buildbot apple-system-backdeployment-10.9"
     artifact_paths:
       - "**/test-results.xml"
     agents:
@@ -590,7 +590,7 @@
     timeout_in_minutes: 120
 
   - label: "Apple back-deployment macosx10.15"
-    command: "libcxx/utils/ci/run-buildbot x86_64-apple-system-backdeployment-10.15"
+    command: "libcxx/utils/ci/run-buildbot apple-system-backdeployment-10.15"
     artifact_paths:
       - "**/test-results.xml"
     agents:
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
@@ -377,14 +377,25 @@
                    -DLIBCXX_TEST_CONFIG="llvm-libc++-shared.cfg.in"
     check-runtimes
 ;;
-x86_64-apple-system)
+apple-system)
     clean
-    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Apple.cmake" \
-                   -DLIBCXX_TEST_CONFIG="apple-libc++-shared.cfg.in" \
-                   -DLIBCXXABI_TEST_CONFIG="apple-libc++abi-shared.cfg.in"
-    check-runtimes
+
+    sdk_root="$(xcrun --sdk macosx --show-sdk-path)"
+    arch="$(uname -m)"
+
+    ${MONOREPO_ROOT}/libcxx/utils/ci/apple-install-libcxx.sh    \
+        --llvm-root ${MONOREPO_ROOT}                            \
+        --build-dir ${BUILD_DIR}                                \
+        --install-dir ${INSTALL_DIR}                            \
+        --symbols-dir "${BUILD_DIR}/symbols"                    \
+        --sdk "macosx"                                          \
+        --architectures "${arch}"                               \
+        --version "999.99"
+
+    # TODO: It would be better to run the tests against the fake-installed version of libc++ instead
+    xcrun --sdk macosx ninja -vC "${BUILD_DIR}/${arch}" check-cxx check-cxxabi
 ;;
-x86_64-apple-system-backdeployment-*)
+apple-system-backdeployment-*)
     clean
 
     if [[ "${OSX_ROOTS}" == "" ]]; then
@@ -395,14 +406,15 @@
         curl "${PREVIOUS_DYLIBS_URL}" | tar -xz --strip-components=1 -C "${OSX_ROOTS}"
     fi
 
-    DEPLOYMENT_TARGET="${BUILDER#x86_64-apple-system-backdeployment-}"
+    DEPLOYMENT_TARGET="${BUILDER#apple-system-backdeployment-}"
 
     # TODO: On Apple platforms, we never produce libc++abi.1.dylib, always libc++abi.dylib.
     #       Fix that in the build so that the tests stop searching for @rpath/libc++abi.1.dylib.
     cp "${OSX_ROOTS}/macOS/libc++abi/${DEPLOYMENT_TARGET}/libc++abi.dylib" \
        "${OSX_ROOTS}/macOS/libc++abi/${DEPLOYMENT_TARGET}/libc++abi.1.dylib"
 
-    PARAMS="target_triple=x86_64-apple-macosx${DEPLOYMENT_TARGET}"
+    arch="$(uname -m)"
+    PARAMS="target_triple=${arch}-apple-macosx${DEPLOYMENT_TARGET}"
     PARAMS+=";cxx_runtime_root=${OSX_ROOTS}/macOS/libc++/${DEPLOYMENT_TARGET}"
     PARAMS+=";abi_runtime_root=${OSX_ROOTS}/macOS/libc++abi/${DEPLOYMENT_TARGET}"
     PARAMS+=";use_system_cxx_lib=True"