I apologise if I am submitting it to a wrong bug tracker. 

nfs-utils fail to compile on armhf due to time_t transition due to -Werror=format when building:

export-cache.c: In function ‘junction_flush_exports_cache’:
export-cache.c:110:51: error: format ‘%ld’ expects argument of type ‘long int’, but argument 4 has type ‘time_t’ {aka ‘long long int’} [-Werror=format=]
  110 | snprintf(flushtime, sizeof(flushtime), "%ld\n", now);
      | ~~^ ~~~
      | | |
      | | time_t {aka long long int}
      | long int
      | %lld

see[1]


[1] https://launchpadlibrarian.net/716561911/buildlog_ubuntu-noble-armhf.nfs-utils_1%3A2.6.4-3ubuntu1_BUILDING.txt.gz