AUR build failing

Can anyone tell me what has gone wrong or what is missing here? I am trying to install Dlume (which I have installed before)

   96 |       __glibc_objsize (__dest));
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~
In function ‘strncpy’,
    inlined from ‘read_config’ at prefs.c:306:3:
/usr/include/bits/string_fortified.h:95:10: warning: ‘__builtin_strncpy’ specified bound 32 equals destination size [-Wstringop-truncation]
   95 |   return __builtin___strncpy_chk (__dest, __src, __len,
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   96 |       __glibc_objsize (__dest));
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
make[2]: *** [Makefile:466: dlume-prefs.o] Error 1
make[2]: Leaving directory '/var/tmp/pamac-build-sandy/dlume/src/dlume-0.2.4/src'
make[1]: *** [Makefile:265: all-recursive] Error 1
make[1]: Leaving directory '/var/tmp/pamac-build-sandy/dlume/src/dlume-0.2.4'
make: *** [Makefile:155: all] Error 2
==> ERROR: A failure occurred in build().
    Aborting...

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FYI, the dlume AUR package hasn’t been touched since 2015. It may need to be patched for newer build tools.

The only, probably not very helpful thing I can say is:

it builds without issue on Arch

it fails to build - with the above error - on fully updated Manjaro stable edition (Xfce, to be specific)

I tried with
pamac build
makepkg -i
yay -S
… don’t know why :man_shrugging:

But Manjaro doesn’t always have the same package versions as Arch - it could be due to this
(pure, but not entirely unfounded, speculation though).