I am not sure about the SOUP_MESSAGE_OVERWRITE_CHUNKS change, but it was definitely already broken when using libsoup-3.0 in a shared build. souphttpsrc probably needs to be ported from SoupMessage to SoupServerMessage when using libsoup-3.0. Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/1111 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2032>