Why jetson-utils can compile older gst api in a host has newer gst api

[BadboyIntheLoop]

Hello everyone, I have a concern. On my jetson orin nx, I use gst version 1.20.3 but jetson-utils can compile with older api like gst_buffer_set_caps() function. I don't know why. I just make with VERBOSE=1 to inspect and I get all .h files that be included don't define gst_buffer_set_caps().

[ 32%] Building CXX object CMakeFiles/jetson-utils.dir/cpp/codec/gstEncoder.cpp.o
/usr/bin/c++ -Djetson_utils_EXPORTS -I/home/sphenikaa08/workspace/jetson-utils/build/aarch64/include -I/home/sphenikaa08/workspace/jetson-utils/build/aarch64/include/jetson-utils -I/usr/include/gstreamer-1.0 -I/usr/include/libxml2 -I/usr/include/libsoup-2.4 -I/usr/include/glib-2.0 -I/usr/include/json-glib-1.0 -I/usr/lib/aarch64-linux-gnu/gstreamer-1.0/include -I/usr/lib/aarch64-linux-gnu/glib-2.0/include -I/usr/src/jetson_multimedia_api/include -I/usr/local/cuda/include -std=c++11 -Wno-write-strings -fPIC -MD -MT CMakeFiles/jetson-utils.dir/cpp/codec/gstEncoder.cpp.o -MF CMakeFiles/jetson-utils.dir/cpp/codec/gstEncoder.cpp.o.d -o CMakeFiles/jetson-utils.dir/cpp/codec/gstEncoder.cpp.o -c /home/sphenikaa08/workspace/jetson-utils/cpp/codec/gstEncoder.cpp

Can anyone explain for me?