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)
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<tr><td><span title='2024-10-14 14:08:43 +0200'>2024-10-14</span></td><td><a href='/guix/commit/gnu/system/image.scm?id=886b410e6f641b473931d7269a9ddbf10a67937f'>image: Add support for btrfs.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/build/image.scm (make-btrfs-image): New variable.
* gnu/system/image.scm (system-disk-image): Support btrfs.

Change-Id: I80a5b52ec478ce5927d6208e324cbb70282c647a
Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Roman Scherer</td></tr>