Copied from Debian.

From: Jérémy Bobbio <lunar@debian.org>
Subject: Remove build date
Bug-Debian: http://bugs.debian.org/782851
 In order to make unzip build reproducibly, we remove the
 (already optional) build date from the binary.

--- a/unix/unix.c
+++ b/unix/unix.c
@@ -1705,7 +1705,7 @@
 #endif /* Sun */
 #endif /* SGI */
 
-#ifdef __DATE__
+#if 0
       " on ", __DATE__
 #else
       "", ""
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<div class='path'>path: <a href='/guix/log/?id=321bb9f0e90140da6a7b064ce3892b261a494ece'>root</a>/<a href='/guix/log/etc?id=321bb9f0e90140da6a7b064ce3892b261a494ece'>etc</a>/<a href='/guix/log/etc/guix-daemon.cil.in?id=321bb9f0e90140da6a7b064ce3892b261a494ece'>guix-daemon.cil.in</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/etc/guix-daemon.cil.in?id=321bb9f0e90140da6a7b064ce3892b261a494ece&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-01-26 09:31:45 +0100'>2022-01-26</span></td><td><a href='/guix/commit/etc/guix-daemon.cil.in?id=bbc2fb0d52128c85c92251ed36d8063b3dcf3c3a'>etc: Remove redundant SELinux permissions block.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/guix-daemon.cil.in (guix_daemon): Consolidate two blocks adding
sock_file permissions on guix_daemon_conf_t.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2022-01-24 11:28:14 +0100'>2022-01-24</span></td><td><a href='/guix/commit/etc/guix-daemon.cil.in?id=98e74d520a30d1ed7d7b47d4f1d9afadefc699e3'>etc: Add more SELinux permissions for the daemon.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/guix-daemon.cil.in (guix_daemon): Permit write on guix_daemon_conf_t
sock_file, necessary for garbage collection.
</span></span></td><td>Marius Bakke</td></tr>