Not possible to use BuildStream in our CI

Error loading pipeline: ostree source at gnu-toolchain/gnome-sdk.bst [line 9 column 6]: Failed to configure origin https://sdk.gnome.org/repo/

Failed to add gpg key from url 'file:///builds/baserock/definitions/buildstream-tests/keys/gnome-sdk.gpg': GPG: Unable to copy remote's keyring: fsetxattr: Operation not supported

https://gitlab.com/baserock/definitions/builds/14065419

I think the problem is that the kernel of the machine that hosts the docker instance doesn't have

CONFIG_EXT4_FS_XATTR=y

enabled (see the logs)