diff --git a/wheelbuild/config.sh b/wheelbuild/config.sh
index b58230e..aedbe46 100644
--- a/wheelbuild/config.sh
+++ b/wheelbuild/config.sh
@@ -240,7 +240,7 @@ function build_libavif {
     cmake --version
     if [ -n "$IS_MACOS" ] && [ "$PLAT" == "arm64" ]; then
         # SVT-AV1 NEON intrinsics require macOS 14
-        local macos_ver=$(sw_vers --productVersion | sed 's/\.[0-9]*//')
+        local macos_ver=$(sw_vers --productVersion | sed 's/\.[.0-9]*//')
         if [ "$macos_ver" -gt "13" ]; then
             LIBAVIF_CMAKE_FLAGS+=(-DAVIF_CODEC_SVT=LOCAL)
         fi