diff --git a/guile.changes b/guile.changes
index 344ff81..283a9a6 100644
--- a/guile.changes
+++ b/guile.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Sep 23 09:17:47 UTC 2019 - Bernhard Wiedemann <bwiedemann@suse.com>
+
+- Do sequential build for reproducible .go files (boo#1102408)
+
 -------------------------------------------------------------------
 Sat Jul  6 09:33:00 UTC 2019 - Jonathan Brielmaier <jbrielmaier@suse.de>
 
diff --git a/guile.spec b/guile.spec
index e0090ef..48fd64b 100644
--- a/guile.spec
+++ b/guile.spec
@@ -112,7 +112,8 @@ rm -r prebuilt/32-bit-big-endian
   --with-pic \
   --with-threads \
   --disable-silent-rules
-make %{?_smp_mflags}
+# do sequential build for reproducible .go files = https://issues.guix.gnu.org/issue/20272 - boo#1102408
+make
 
 %check
 LD_LIBRARY_PATH="." make %{?_smp_mflags} check