diff --git a/chsql/CMakeLists.txt b/chsql/CMakeLists.txt
index 845c883..3c8db31 100644
--- a/chsql/CMakeLists.txt
+++ b/chsql/CMakeLists.txt
@@ -7,7 +7,7 @@ set(TARGET_NAME chsql)
 
 project(${TARGET_NAME})
 
-if(DUCKDB_EXPLICIT_PLATFORM MATCHES "linux_arm64")
+if(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64")
     set(ARCH_FLAGS "-march=armv8-a")
 endif()
 
@@ -17,7 +17,7 @@ ExternalProject_Add(clickhouse_cpp_external
         CMAKE_ARGS
         -DCMAKE_OSX_ARCHITECTURES=${CMAKE_OSX_ARCHITECTURES}
         -DCMAKE_OSX_DEPLOYMENT_TARGET=${CMAKE_OSX_DEPLOYMENT_TARGET}
-        -DCMAKE_CXX_FLAGS=-fPIC ${ARCH_FLAGS}
+        "-DCMAKE_CXX_FLAGS=-fPIC ${ARCH_FLAGS}"
         -DCMAKE_C_FLAGS=${ARCH_FLAGS}
         INSTALL_COMMAND ""  # Skip install step
         BUILD_BYPRODUCTS