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
'sub right'></td></tr></table>
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<div class='path'>path: <a href='/guix/log/?id=cdffb73c04d0c68d7edf19ee02fc3a554dea04bc'>root</a>/<a href='/guix/log/gnu?id=cdffb73c04d0c68d7edf19ee02fc3a554dea04bc'>gnu</a>/<a href='/guix/log/gnu/packages?id=cdffb73c04d0c68d7edf19ee02fc3a554dea04bc'>packages</a>/<a href='/guix/log/gnu/packages/clojure.scm?id=cdffb73c04d0c68d7edf19ee02fc3a554dea04bc'>clojure.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/packages/clojure.scm?id=cdffb73c04d0c68d7edf19ee02fc3a554dea04bc&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-02-10 17:45:38 +0100'>2019-02-10</span></td><td><a href='/guix/commit/gnu/packages/clojure.scm?id=99631313e2487c1ea853ee2e2e74a848113ed490'>gnu: clojure-tools-macro: Don't use unstable tarball.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/clojure.scm (clojure-tools-macro)[source]: Use GIT-FETCH and
GIT-FILE-NAME.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2019-02-10 17:45:38 +0100'>2019-02-10</span></td><td><a href='/guix/commit/gnu/packages/clojure.scm?id=62dbf78b65424bf8c03a47338bcfba1fa5786246'>gnu: clojure-algo-monads: Don't use unstable tarball.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/clojure.scm (clojure-algo-monads)[source]: Use GIT-FETCH and
GIT-FILE-NAME.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2019-02-10 17:45:38 +0100'>2019-02-10</span></td><td><a href='/guix/commit/gnu/packages/clojure.scm?id=85e0827d909ff352ee8f56ccb740a7d5913e560e'>gnu: clojure-algo-generic: Don't use unstable tarball.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/clojure.scm (clojure-algo-generic)[source]: Use GIT-FETCH and
GIT-FILE-NAME.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2019-01-29 10:59:06 +0100'>2019-01-29</span></td><td><a href='/guix/commit/gnu/packages/clojure.scm?id=9e532ae22a2064298dbfbd45c0fa07e290520818'>gnu: clojure: Update to 1.10.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/clojure.scm (clojure): Update to 1.10.0.
[source]: Use 'git-fetch'.
</span></span></td><td>Mathieu Lirzin</td></tr>
<tr><td><span title='2018-11-24 15:20:51 +0100'>2018-11-24</span></td><td><a href='/guix/commit/gnu/packages/clojure.scm?id=96cfa168e50c3e61ba83899ef25808f0066fff72'>gnu: clojure: Move to new clojure.scm.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/local.mk (clojure): Include new clojure.scm.
* gnu/packages/clojure.scm: Add clojure, clojure-algo-generic,
  clojure-algo-monads, clojure-core-match, clojure-instaparse,
  clojure-tools-macro.
* gnu/packages/lisp.scm: Remove clojure, clojure-algo-generic,
  clojure-algo-monads, clojure-core-match, clojure-instaparse,
  clojure-tools-macro.
</span></span></td><td>Pierre Neidhardt</td></tr>