This following patch was originally found at the debian mingw-w64 team's
mingw-w64 repo located here:
https://salsa.debian.org/mingw-w64-team/mingw-w64.git

Invoke the following in the aforementioned repo to see the original patch:

  $ git show 4974e2c:debian/patches/dlltool-temp-prefix.patch

Description: Specify dlltool's temp prefix
Author: Stephen Kitt <steve@sk2.org>

By default dlltool uses its pid for the object files it generates.
Enforcing its temp prefix allows the files it generates to be
reproducible.

--- a/mingw-w64-crt/Makefile.am
+++ b/mingw-w64-crt/Makefile.am
@@ -36,7 +36,7 @@
   DTDEF32=$(GENLIB) $(DLLTOOLFLAGS32) $(AM_DLLTOOLFLAGS)
   DTDEF64=$(GENLIB) $(DLLTOOLFLAGS64) $(AM_DLLTOOLFLAGS)
 else
-  AM_DLLTOOLFLAGS=-k --as=$(AS) --output-lib $@
+  AM_DLLTOOLFLAGS=-k --as=$(AS) --output-lib $@ --temp-prefix $$(basename $@ .a)
   DLLTOOLFLAGSARM32=-m arm
   DLLTOOLFLAGSARM64=-m arm64
   DLLTOOLFLAGS32=--as-flags=--32 -m i386
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<div class='path'>path: <a href='/guix/log/?id=f8a7bfd28caa5a45841a211a93ac62f266680fbb'>root</a>/<a href='/guix/log/gnu?id=f8a7bfd28caa5a45841a211a93ac62f266680fbb'>gnu</a>/<a href='/guix/log/gnu/home?id=f8a7bfd28caa5a45841a211a93ac62f266680fbb'>home</a>/<a href='/guix/log/gnu/home/services?id=f8a7bfd28caa5a45841a211a93ac62f266680fbb'>services</a>/<a href='/guix/log/gnu/home/services/messaging.scm?id=f8a7bfd28caa5a45841a211a93ac62f266680fbb'>messaging.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/home/services/messaging.scm?id=f8a7bfd28caa5a45841a211a93ac62f266680fbb&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-03-16 23:03:17 +0100'>2023-03-16</span></td><td><a href='/guix/commit/gnu/home/services/messaging.scm?id=8f219e658d8d2d89a2d6ec10729099130791a3a2'>home: services: kodi, znc, ssh-agent: Use 'match-record'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/home/services/media.scm (home-kodi-services): Use 'match-record'
instead of 'match'.
* gnu/home/services/messaging.scm (home-znc-services): Likewise.
* gnu/home/services/ssh.scm (home-ssh-agent-services): Likewise.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-03-16 17:29:03 +0100'>2023-03-16</span></td><td><a href='/guix/commit/gnu/home/services/messaging.scm?id=c68648a8a503c59b17ec38107e7c787f3b7370f3'>home: services: znc: Remove host-side use of (shepherd support).</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a followup to 193f547ca35eb49ef57bd9a25b67cb3965f10b03, which
inadvertently pulled in (shepherd support) on the host side.

* gnu/home/services/messaging.scm (home-znc-services): Change 'command' and
'log-file' to gexps.  Add 'modules' field to 'shepherd-service'.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-03-16 14:32:50 +0100'>2023-03-16</span></td><td><a href='/guix/commit/gnu/home/services/messaging.scm?id=193f547ca35eb49ef57bd9a25b67cb3965f10b03'>gnu: home: services: Add home-znc-service-type.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/home/services/messaging.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* po/guix/POTFILES.in: Likewise.
* doc/guix.texi (Messaging Home Services): Document it in new subsection.
</span></span></td><td>Jan (janneke) Nieuwenhuizen</td></tr>