Update build.sh

Co-authored-by: Isuru Fernando <isuruf@gmail.com>

Author: lucascolley

Tools/pixi-packages/build.sh

@@ -7,7 +7,7 @@ if [[ "${PYTHON_VARIANT}" == "freethreading" ]]; then
 elif [[ "${PYTHON_VARIANT}" == "asan" ]]; then
     CONFIGURE_EXTRA="--with-address-sanitizer"
     export ASAN_OPTIONS="strict_init_order=true"
-    if [[ "$target_platform" == linux-* ]]; then
+    if [[ "$target_platform" == linux-* && "$c_compiler" == "clang" ]]; then
         export LDFLAGS="-shared-libsan $LDFLAGS"
     fi
 elif [[ "${PYTHON_VARIANT}" == "tsan_freethreading" ]]; then