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/reproducible-gendef.patch

Description: Drop __DATE__ from gendef
Author: Stephen Kitt <skitt@debian.org>

This allows gendef to be built reproducibly.

--- a/mingw-w64-tools/gendef/src/gendef.c
+++ b/mingw-w64-tools/gendef/src/gendef.c
@@ -196,7 +196,6 @@
                    "  By default, the output files are named after their DLL counterparts\n"
                    "  gendef MYDLL.DLL     Produces MYDLL.def\n"
                    "  gendef - MYDLL.DLL   Prints the exports to stdout\n");
-  fprintf (stderr, "\nBuilt on %s\n", __DATE__);
   fprintf (stderr, "\nReport bugs to <mingw-w64-public@lists.sourceforge.net>\n");
   exit (0);
 }
ojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=11590bff50fe0244e66c11d995aa5301c8965959'>refs</a><a class='active' href='/guix/log/gnu/packages/idris.scm'>log</a><a href='/guix/tree/gnu/packages/idris.scm?id=11590bff50fe0244e66c11d995aa5301c8965959'>tree</a><a href='/guix/commit/gnu/packages/idris.scm?id=11590bff50fe0244e66c11d995aa5301c8965959'>commit</a><a href='/guix/diff/gnu/packages/idris.scm?id=11590bff50fe0244e66c11d995aa5301c8965959'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/idris.scm'>
<input type='hidden' name='id' value='11590bff50fe0244e66c11d995aa5301c8965959'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=11590bff50fe0244e66c11d995aa5301c8965959'>root</a>/<a href='/guix/log/gnu?id=11590bff50fe0244e66c11d995aa5301c8965959'>gnu</a>/<a href='/guix/log/gnu/packages?id=11590bff50fe0244e66c11d995aa5301c8965959'>packages</a>/<a href='/guix/log/gnu/packages/idris.scm?id=11590bff50fe0244e66c11d995aa5301c8965959'>idris.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/idris.scm?id=11590bff50fe0244e66c11d995aa5301c8965959&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-12-13 17:48:25 +0100'>2021-12-13</span></td><td><a href='/guix/commit/gnu/packages/idris.scm?id=8394619baceb118df92e355377fd543bb1aa501a'>gnu: Simplify package inputs.</a><span class='msg-avail'>...<span class='msg-tooltip'>This commit was obtained by running:

  ./pre-inst-env guix style

without any additional argument.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-10-08 09:13:53 +0200'>2021-10-08</span></td><td><a href='/guix/commit/gnu/packages/idris.scm?id=ed044023d7ed8cfe113f4d6e1a6af17a09f49795'>gnu: idris: Fix build.</a><span class='msg-avail'>...<span class='msg-tooltip'>Backport some commits from upstream.

* gnu/packages/patches/idris-build-with-haskeline-0.8.patch:
* gnu/packages/patches/idris-build-with-megaparsec-9.patch: New patches
* gnu/local.mk (dist_patch_DATA): Add them.
* gnu/packages/idris.scm (idris): Use them.

Signed-off-by: Lars-Dominik Braun &lt;lars@6xq.net&gt;
</span></span></td><td>Xinglu Chen</td></tr>
<tr><td><span title='2021-10-08 09:13:52 +0200'>2021-10-08</span></td><td><a href='/guix/commit/gnu/packages/idris.scm?id=b97f549b14402421fcfb360ddd4cff7de93b9af0'>gnu: Update Haskell ecosystem.</a><span class='msg-avail'>...<span class='msg-tooltip'>Bump packages’ versions to the lastest Stackage or Hackage
release. Since packages are interdependent, do so in a single commit.

525 packages have been updated.

These packages have been removed, because they fail to build, have no
newer version available and no dependencies:

corrode
ghc-easytest
ghc-edisonapi
ghc-edisoncore
ghc-pandoc-types
ghc-regex-tdfa-text

These have been removed, because they are no longer required:

ghc-happy-1.19.9
ghc-prettyprinter-1.6
ghc-protolude-0.3

ghc-pandoc-citeproc and pandoc-citeproc have been removed, because pandoc
does not use them any more.

Co-authored-by: Xinglu Chen &lt;public@yoctocell.xyz&gt;
</span></span></td><td>Lars-Dominik Braun</td></tr>