Fails here:
https://build.opensuse.org/package/live_build_log/openSUSE:Factory:Staging:B/efivar/standard/x86_64

due to:
[   25s] In file included from /usr/include/linux/fs.h:19,
[   25s]                  from efivarfs.c:38:
[   25s] /usr/include/linux/mount.h:95:6: error: redeclaration of 'enum
fsconfig_command'
[   25s]    95 | enum fsconfig_command {
[   25s]       |      ^~~~~~~~~~~~~~~~
[   25s] In file included from util.h:37,
[   25s]                  from efivar.h:25,
[   25s]                  from efivarfs.c:36:
[   25s] /usr/include/sys/mount.h:189:6: note: originally defined here
[   25s]   189 | enum fsconfig_command
[   25s]       |      ^~~~~~~~~~~~~~~~
[   25s] /usr/include/linux/mount.h:96:9: error: redeclaration of enumerator
'FSCONFIG_SET_FLAG'
[   25s]    96 |         FSCONFIG_SET_FLAG       = 0,    /* Set parameter,
supplying no value */
[   25s]       |         ^~~~~~~~~~~~~~~~~