diff --git a/swig.changes b/swig.changes
index 2ba5ae7..f7692ef 100644
--- a/swig.changes
+++ b/swig.changes
@@ -1,3 +1,11 @@
+-------------------------------------------------------------------
+Wed Jan  3 14:30:52 UTC 2018 - tchvatal@suse.com
+
+- Reduce some conditionals for old distros lets consider sle11/rhel6
+  as minimal supported configuration
+- Make sure we can be built and distributed with python3 only
+  present in the system
+
 -------------------------------------------------------------------
 Tue Nov  7 20:07:12 UTC 2017 - mpluskal@suse.com
 
diff --git a/swig.spec b/swig.spec
index 0a3e642..c849ab2 100644
--- a/swig.spec
+++ b/swig.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package swig
 #
-# Copyright (c) 2017 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2018 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -17,12 +17,24 @@
 
 
 %bcond_with  swig_ocaml
-
+%if 0%{?fedora} + 0%{?rhel_version} + 0%{?centos_version} > 0
+%define docpath %{_docdir}/%{name}-%{version}
+BuildRequires:  perl-Test-Simple
+BuildRequires:  perl-devel
+BuildRequires:  pkgconfig
+BuildRequires:  ruby
+%endif
+%if 0%{?suse_version} > 0
+%define docpath %{_docdir}/%{name}
+BuildRequires:  fdupes
+BuildRequires:  pkgconfig
+BuildRequires:  ruby-devel
+%endif
 Name:           swig
 Version:        3.0.12
 Release:        0
 Summary:        Simplified Wrapper and Interface Generator
-License:        GPL-3.0+ and BSD-3-Clause
+License:        GPL-3.0+ AND BSD-3-Clause
 Group:          Development/Languages/C and C++
 Url:            http://www.swig.org/
 Source:         http://sourceforge.net/projects/swig/files/swig/%{name}-%{version}/%{name}-%{version}.tar.gz
@@ -32,56 +44,24 @@ Patch3:         swig-ocaml-int64.patch
 Patch4:         swig-perl526.patch
 BuildRequires:  autoconf
 BuildRequires:  automake
+BuildRequires:  gcc-c++
+BuildRequires:  libtool
+BuildRequires:  pcre-devel
+BuildRequires:  perl
 %if 0%{?suse_version} > 1325
 BuildRequires:  libboost_headers-devel
-BuildRequires:  python2-devel
 BuildRequires:  python3-devel
+BuildRequires:  python3-tools
 %else
 BuildRequires:  boost-devel
 BuildRequires:  python-devel
 %endif
-BuildRequires:  gcc-c++
-BuildRequires:  libtool
 %if %{with swig_ocaml}
 BuildRequires:  ncurses-devel
 BuildRequires:  ocaml
 BuildRequires:  ocaml-camlp4-devel
 BuildRequires:  ocaml-findlib
 %endif
-BuildRequires:  pcre-devel
-BuildRequires:  perl
-%if 0%{?rhel_version} > 0
-BuildRequires:  -vim
-%endif
-%if 0%{?fedora} + 0%{?rhel_version} + 0%{?centos_version} > 0
-%define docpath %{_docdir}/%{name}-%{version}
-BuildRequires:  pkgconfig
-BuildRequires:  ruby
-%if 0%{?rhel_version} < 600 && 0%{?centos_version} < 600
-# not available on RHEL-6
-BuildRequires:  ruby-devel
-%endif
-%if 0%{?fedora} > 0 || 0%{?rhel_version} >= 600  ||0%{?centos_version} >= 600
-BuildRequires:  perl-Test-Simple
-BuildRequires:  perl-devel
-%endif
-%endif
-%if 0%{?suse_version} > 0
-%define docpath %{_docdir}/%{name}
-%if 0%{?suse_version} > 1010
-BuildRequires:  fdupes
-%endif
-# SLE9
-%if 0%{?suse_version} < 920
-BuildRequires:  pkgconfig
-BuildRequires:  ruby
-%else
-BuildRequires:  pkg-config
-# SLE10 and up
-BuildRequires:  ruby-devel
-%endif
-%endif
-BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 
 %description
 SWIG is a compiler that attempts to make it easy to integrate C, C++,
@@ -98,9 +78,7 @@ Summary:        SWIG Manual
 License:        BSD-3-Clause
 Group:          Documentation/Man
 Requires:       swig
-%if 0%{?suse_version} >= 1120
 BuildArch:      noarch
-%endif
 
 %description doc
 SWIG is a compiler that attempts to make it easy to integrate C, C++,
@@ -152,10 +130,13 @@ export CCSHARED="-fPIC"
 make %{?_smp_mflags}
 
 %check
-make check
+%if 0%{?suse_version} > 1325
+export PY3=true
+%endif
+make %{?_smp_mflags} check
 
 %install
-make install DESTDIR=%{buildroot}
+%make_install
 
 install -d %{buildroot}%{docpath}
 cp -a TODO ANNOUNCE CHANGES* LICENSE README Doc/{Devel,Manual} \
@@ -175,9 +156,7 @@ find %{buildroot}%{_libdir}/swig -name '*.h' -perm /111 | \
 	xargs --no-run-if-empty chmod -x
 ln -s %{_libdir}/swig/examples %{buildroot}%{docpath}/Examples
 
-%if 0%{?suse_version} > 1010
 %fdupes %{buildroot}
-%endif
 
 %files
 %defattr(644,root,root,755)
@@ -187,12 +166,10 @@ ln -s %{_libdir}/swig/examples %{buildroot}%{docpath}/Examples
 %attr(755,root,root) %{_bindir}/swig
 
 %files doc
-%defattr(-,root,root)
 %{docpath}/Devel
 %{docpath}/Manual
 
 %files examples
-%defattr(-,root,root)
 %{docpath}/Examples
 %{_libdir}/swig