diff --git a/.cirrus.yml b/.cirrus.yml
index f387fcfbd..57aae22af 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -51,7 +51,7 @@ task:
   - #find /Applications/Xcode-14.3.1.app -name libunwind.dylib
   - xcodebuild -version
   - export CC=/Applications/Xcode-14.0.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
-  - export CFLAGS="-O2 -unwindlib=none -Wno-macro-redefined -arch x86_64 -miphoneos-version-min=10.0"
+  - export CFLAGS="-O2 -unwindlib=none -Wno-macro-redefined -isysroot /Applications/Xcode-14.0.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.0.sdk -arch x86_64 -miphoneos-version-min=10.0"
   - make TARGET=CORE2 DYNAMIC_ARCH=1 NUM_THREADS=32 HOSTCC=clang NOFORTRAN=1
   always:
     config_artifacts: