Do not introduce timestamps in PNG files (for icons).
See <https://wiki.debian.org/ReproducibleBuilds/TimestampsInPNG>.

--- awesome-3.4.15/CMakeLists.txt	2013-02-11 14:50:21.000000000 +0100
+++ awesome-3.4.15/CMakeLists.txt	2016-06-16 13:59:30.528125439 +0200
@@ -295,7 +295,7 @@ macro(a_icon_convert match replacement i
         set(ALL_ICONS ${ALL_ICONS} ${output})
 
         add_custom_command(
-            COMMAND ${CONVERT_EXECUTABLE} ${input} -strip ${ARGN} ${output}
+            COMMAND ${CONVERT_EXECUTABLE} +set date:create +set date:modify -define png:exclude-chunk=time ${input} -strip ${ARGN} ${output}
             OUTPUT  ${output}
             DEPENDS ${input}
             VERBATIM)
hange='this.form.submit();'>
<option value='koszko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek'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=8365b4a0a3ff110069840191df80a6cb9795f727'>refs</a><a class='active' href='/guix/log/build-aux/convert-xref.scm'>log</a><a href='/guix/tree/build-aux/convert-xref.scm?id=8365b4a0a3ff110069840191df80a6cb9795f727'>tree</a><a href='/guix/commit/build-aux/convert-xref.scm?id=8365b4a0a3ff110069840191df80a6cb9795f727'>commit</a><a href='/guix/diff/build-aux/convert-xref.scm?id=8365b4a0a3ff110069840191df80a6cb9795f727'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/build-aux/convert-xref.scm'>
<input type='hidden' name='id' value='8365b4a0a3ff110069840191df80a6cb9795f727'/><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=8365b4a0a3ff110069840191df80a6cb9795f727'>root</a>/<a href='/guix/log/build-aux?id=8365b4a0a3ff110069840191df80a6cb9795f727'>build-aux</a>/<a href='/guix/log/build-aux/convert-xref.scm?id=8365b4a0a3ff110069840191df80a6cb9795f727'>convert-xref.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/build-aux/convert-xref.scm?id=8365b4a0a3ff110069840191df80a6cb9795f727&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-10-17 18:26:44 +0200'>2021-10-17</span></td><td><a href='/guix/commit/build-aux/convert-xref.scm?id=0623138ffa5b066afc25547ffdeb97753cb0ee9a'>maint: Factorize po xref translation.</a><span class='msg-avail'>...<span class='msg-tooltip'>This ensures we use the same method in "make" as in "guix/self.scm".

* Makefile.am: Build guix/build/po.scm.
* build-aux/convert-xref.scm: New file.
* doc/local.mk (xref_command): Use it.
* guix/self.scm (translate-cross-references): Move it...
* guix/build/po.scm: Parse comments and flags separately to find fuzzy
flags.
(translate-cross-references): ...here.
(parse-tree-&gt;assoc): Ignore fuzzy entries.
</span></span></td><td>Julien Lepiller</td></tr>
-SUBVOLUME-FILE-NAME argument.  Normalize the KEYMAP file as well.
(eye-candy): Add a BTRFS-SUBVOLUME-FILE-NAME parameter, and use it, along with
the NORMALIZE-FILE procedure, to normalize the FONT-FILE and IMAGE nested
variables.  Adjust doc.
* gnu/bootloader/depthcharge.scm (depthcharge-configuration-file): Adapt.
* gnu/bootloader/extlinux.scm (extlinux-configuration-file): Likewise.
* gnu/system/file-systems.scm (btrfs-subvolume?)
(btrfs-store-subvolume-file-name): New procedures.
* gnu/system.scm (operating-system-bootcfg): Specify the Btrfs
subvolume file name the store resides on to the
`operating-system-bootcfg' procedure, using the new
BTRFS-SUBVOLUME-FILE-NAME argument.
* doc/guix.texi (File Systems): Add a Btrfs subsection to document the use of
subvolumes.
* gnu/tests/install.scm (%btrfs-root-on-subvolume-os)
(%btrfs-root-on-subvolume-os-source)
(%btrfs-root-on-subvolume-installation-script)
(%test-btrfs-root-on-subvolume-os): New variables.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2019-04-03 18:21:42 +0200'>2019-04-03</span></td><td><a href='/guix/commit/gnu/bootloader/depthcharge.scm?id=96c90474c0cbfe88d1dccb9cb52a0f1b3a1505e7'>gnu: Add configuration for depthcharge bootloader.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/bootloader/depthcharge: New file.
* gnu/local.mk [GNU_SYSTEM_MODULES]: Adjust accordingly.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Timothy Sample</td></tr>