Arch had a patch rolled out yesterday [1][2][3] that switches to the git repo. On top of that the logic in the runtime shim and build script modifier was orchestrated to target Debian and RPM build systems and environments [4].

[1] https://gitlab.archlinux.org/archlinux/packaging/packages/xz/-/commit/881385757abdc39d3cfea1c3e34ec09f637424ad

[2] https://gitlab.archlinux.org/archlinux/packaging/packages/xz/-/issues/2

[3] https://security.archlinux.org/CVE-2024-3094

[4] https://www.openwall.com/lists/oss-security/2024/03/29/4