diff --git a/packages/g/go1.13/.files b/packages/g/go1.13/.files
index 1da4bd2231d..70b6f807bd4 100644
Binary files a/packages/g/go1.13/.files and b/packages/g/go1.13/.files differ
diff --git a/packages/g/go1.13/.rev b/packages/g/go1.13/.rev
index a88940875b1..6f8b155762d 100644
--- a/packages/g/go1.13/.rev
+++ b/packages/g/go1.13/.rev
@@ -160,4 +160,12 @@ preparation for submit to SUSE. Remove %defattr(-,root,root,-) in %files</commen
     <comment>Prepare for RPM 4.20 (forwarded request 1152221 from dimstar)</comment>
     <requestid>1152293</requestid>
   </revision>
+  <revision rev="15" vrev="4">
+    <srcmd5>8837516c5cc4e7b61eab23edff091bc5</srcmd5>
+    <version>1.13.15</version>
+    <time>1713357976</time>
+    <user>dimstar_suse</user>
+    <comment>Add reproducible.patch to avoid build-time race (boo#1102408) (forwarded request 1168496 from bmwiedemann)</comment>
+    <requestid>1168528</requestid>
+  </revision>
 </revisionlist>
diff --git a/packages/g/go1.13/go1.13.changes b/packages/g/go1.13/go1.13.changes
index 8f9513f7be8..f54e56d3096 100644
--- a/packages/g/go1.13/go1.13.changes
+++ b/packages/g/go1.13/go1.13.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Apr 15 18:00:45 UTC 2024 - Bernhard Wiedemann <bwiedemann@suse.com>
+
+- Add reproducible.patch to avoid build-time race (boo#1102408)
+
 -------------------------------------------------------------------
 Tue Feb 27 11:31:09 UTC 2024 - Dominique Leuenberger <dimstar@opensuse.org>
 
diff --git a/packages/g/go1.13/go1.13.spec b/packages/g/go1.13/go1.13.spec
index 0a9f3fbadde..087d9c96727 100644
--- a/packages/g/go1.13/go1.13.spec
+++ b/packages/g/go1.13/go1.13.spec
@@ -140,6 +140,7 @@ Patch9:         gcc7-go.patch
 Patch11:        gcc9-rsp-clobber.patch
 # PATCH-FIX-UPSTREAM prefer /etc/hosts over DNS when /etc/nsswitch.conf not present boo#1172868 gh#golang/go#35305
 Patch12:        go1.x-prefer-etc-hosts-over-dns.patch
+Patch13:        reproducible.patch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 # boostrap
 %if %{with gccgo}
@@ -235,6 +236,7 @@ Go runtime race detector libraries. Install this package if you wish to use the
 %patch -P 9 -p1
 %endif
 %endif
+%patch -P 13 -p1
 
 cp %{SOURCE4} .
 
diff --git a/packages/g/go1.13/reproducible.patch b/packages/g/go1.13/reproducible.patch
new file mode 100644
index 00000000000..57f7d354bed
--- /dev/null
+++ b/packages/g/go1.13/reproducible.patch
@@ -0,0 +1,23 @@
+Date: 2024-04-15
+Author: Bernhard M. Wiedemann <bmwiedemann suse de>
+
+Workaround variations in build results between -j1 and -j4 builds.
+
+Compilation time on 4-core VM increases from 211 to 322 seconds,
+while 1-core VM remains at 519 s.
+ 
+This patch applies to go1.15, go1.14 and go1.13 packages.
+
+Index: go/src/make.bash
+===================================================================
+--- go.orig/src/make.bash
++++ go/src/make.bash
+@@ -209,7 +209,7 @@ fi
+ # Run dist bootstrap to complete make.bash.
+ # Bootstrap installs a proper cmd/dist, built with the new toolchain.
+ # Throw ours, built with Go 1.4, away after bootstrap.
+-./cmd/dist/dist bootstrap $buildall $vflag $GO_DISTFLAGS "$@"
++taskset 1 ./cmd/dist/dist bootstrap $buildall $vflag $GO_DISTFLAGS "$@"
+ rm -f ./cmd/dist/dist
+ 
+ # DO NOT ADD ANY NEW CODE HERE.