diff --git a/a2ps.changes b/a2ps.changes
index 633fe4f..10c3426 100644
--- a/a2ps.changes
+++ b/a2ps.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Mon Jul 16 09:50:16 UTC 2018 - bwiedemann@suse.com
+
+- Add reproducible.patch to fix build date (boo#1047218)
+- Run build non-parallelized and with make -B because of
+  poorly specified make build dependencies to make build reproducible
+
 -------------------------------------------------------------------
 Thu Jun 29 09:14:23 UTC 2017 - werner@suse.de
 
diff --git a/a2ps.spec b/a2ps.spec
index 2807321..4f70f9c 100644
--- a/a2ps.spec
+++ b/a2ps.spec
@@ -48,6 +48,7 @@ Patch15:        a2ps-4.14-gperf.patch
 # PATCH-FIX-SUSE Bug 955194 - CVE-2015-8107: CVE-2015-8107 - a2ps(gnu) v4.14 format string vulnerability
 Patch16:        a2ps-4.14-bnc955194.patch
 Patch17:        a2ps-buildcompare.patch
+Patch18:        reproducible.patch
 BuildRequires:  autoconf
 BuildRequires:  automake
 BuildRequires:  emacs-nox
@@ -57,6 +58,7 @@ BuildRequires:  gv
 BuildRequires:  psutils
 BuildRequires:  texlive-latex
 BuildRequires:  timezone
+BuildRequires:  bison
 Requires:       file
 Requires:       ghostscript-fonts-std
 Requires:       glibc
@@ -128,6 +130,7 @@ touch -r configure.in .ref
 %patch16 -p0
 %patch17 -p1
 %patch0   -b .p0
+%patch18 -p1
 cp -f %{SOURCE3} po/ko.po
 find -type f | grep -vE '(parseppd|parsessh).y' | xargs \
 sed -ri 's/59 Temple Place(,| -) Suite 330/51 Franklin Street, Fifth Floor/;s/02111-1307/02110-1301/'
@@ -153,9 +156,10 @@ find -name Makefile.in | xargs touch
      con="$con ${in##*/}"
    done
  popd
- make %{?_smp_mflags} -C contrib/ ${con} LDFLAGS="-pie"
+ make -C contrib/ ${con} LDFLAGS="-pie"
  sh ./config.status
- make %{?_smp_mflags} PSFONT_PATH=%{_datadir}/ghostscript/fonts LDFLAGS="-pie" MAKEINFO='makeinfo --force'
+ # the build system is awful so we need to build with -B and avoid parallelism
+ make PSFONT_PATH=%{_datadir}/ghostscript/fonts LDFLAGS="-pie" MAKEINFO='makeinfo --force' -B
  pushd doc
    texi2html a2ps.texi
  popd
diff --git a/reproducible.patch b/reproducible.patch
new file mode 100644
index 0000000..a05ee7e
--- /dev/null
+++ b/reproducible.patch
@@ -0,0 +1,13 @@
+Index: a2ps-4.14/man/help2man
+===================================================================
+--- a2ps-4.14.orig/man/help2man
++++ a2ps-4.14/man/help2man
+@@ -164,7 +164,7 @@ my ($help_text, $version_text) = map {
+ 	or die "$this_program: can't get `--$_' info from $ARGV[0]\n"
+ } qw(help version);
+ 
+-my $date = strftime "%B %Y", localtime;
++my $date = strftime "%B %Y", gmtime($ENV{SOURCE_DATE_EPOCH} || time);
+ (my $program = $ARGV[0]) =~ s!.*/!!;
+ my $package = $program;
+ my $version;