--- mono-4.4.1/mcs/class/monodoc/Monodoc/storage/ZipStorage.cs.orig	2018-11-26 22:16:25.008879747 +0100
+++ mono-4.4.1/mcs/class/monodoc/Monodoc/storage/ZipStorage.cs	2018-11-26 22:21:53.969770985 +0100
@@ -74,6 +74,12 @@
 				id = GetNewCode ();
 
 			ZipEntry entry = new ZipEntry (id);
+			var SOURCE_DATE_EPOCH_string = Environment.GetEnvironmentVariable("SOURCE_DATE_EPOCH");
+			if (SOURCE_DATE_EPOCH_string != null)
+			{
+				var SOURCE_DATE_EPOCH = Convert.ToInt64(SOURCE_DATE_EPOCH_string);
+				entry.DateTime = new DateTime(SOURCE_DATE_EPOCH, DateTimeKind.Utc);
+			}
 			zipOutput.PutNextEntry (entry);
 		}
 
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<tr><td><span title='2018-10-15 22:40:35 +0200'>2018-10-15</span></td><td><a href='/guix/commit/nix/libstore/worker-protocol.hh?id=6ef61cc4c30e94acbd7437f19c893f63a7112267'>daemon: Support multiplexed build output.</a><span class='msg-avail'>...<span class='msg-tooltip'>This allows clients to tell whether output comes from the daemon or, if
it comes from a builder, from which builder it comes.  The latter is
particularly useful when MAX-BUILD-JOBS &gt; 1.

* nix/libstore/build.cc (DerivationGoal::tryBuildHook)
(DerivationGoal::startBuilder): Print the child's PID in "@ build-started"
traces.
(DerivationGoal::handleChildOutput): Define 'prefix', pass it to
'writeToStderr'.
* nix/libstore/globals.cc (Settings:Settings): Initialize
'multiplexedBuildOutput'.
(Settings::update): Likewise.
* nix/libstore/globals.hh (Settings)[multiplexedBuildOutput]: New field.
Update 'printBuildTrace' documentation.
* nix/libstore/worker-protocol.hh (PROTOCOL_VERSION): Bump to 0.163.
* nix/nix-daemon/nix-daemon.cc (performOp) &lt;wopSetOptions&gt;: Special-case
"multiplexed-build-output" and remove "use-ssh-substituter".
* guix/store.scm (set-build-options): Add #:multiplexed-build-output?
and honor it.
(%protocol-version): Bump to #x163.
* tests/store.scm ("multiplexed-build-output"): New test.

fixlet
</span></span></td><td>Ludovic Courtès</td></tr>