const ver_list_base = metadata.version_table.get(.{
            .arch = target.cpu.arch,
            .os = target.os.tag,
            .abi = target.abi,
        }) orelse return error.GLibCUnavailableForThisTarget;
        const target_ver_index = for (metadata.all_versions) |ver, i| {
            switch (ver.order(target_version)) {
                .eq => break i,
                .lt => continue,
                .gt => {
                    // TODO Expose via compile error mechanism instead of log.
                    std.log.warn("invalid target glibc version: {}", .{target_version});
                    return error.InvalidTargetGLibCVersion;
                },
            }
        } else blk: {
            const latest_index = metadata.all_versions.len - 1;
            std.log.warn("zig cannot build new glibc version {}; providing instead {}", .{
                target_version, metadata.all_versions[latest_index],
            });
            break :blk latest_index;
        };