diff --git a/libkolabxml.spec b/libkolabxml.spec
index 1f931b2..83796e4 100644
--- a/libkolabxml.spec
+++ b/libkolabxml.spec
@@ -51,7 +51,7 @@
 
 Name:           libkolabxml
 Version:        1.1.6
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        Kolab XML format collection parser library
 
 License:        LGPLv3+
@@ -72,6 +72,15 @@ BuildRequires:  uuid-devel
 BuildRequires:  xerces-c-devel
 BuildRequires:  xsd
 
+# libkolab FTBFS, so ...
+# https://bugzilla.redhat.com/show_bug.cgi?id=1518800
+%global libkolab_obsoletes 1.0.2-20
+%if 0%{?libkolab_obsoletes:1}
+Obsoletes: libkolab < %{libkolab_obsoletes}
+Obsoletes: libkolab-devel < %{libkolab_obsoletes}
+Obsoletes: python2-libkolab < %{libkolab_obsoletes}
+%endif
+
 %if 0%{?with_csharp} < 1
 Obsoletes:      csharp-kolabformat < %{version}-%{release}
 #Provides:       csharp-kolabformat = %{version}-%{release}
@@ -184,7 +193,6 @@ popd
 
 make -C build
 
-
 %install
 make install DESTDIR=%{buildroot} INSTALL='install -p' -C build
 
@@ -217,8 +225,7 @@ python src/python/test.py ||:
 popd
 
 
-%post -p /sbin/ldconfig
-%postun -p /sbin/ldconfig
+%ldconfig_scriptlets
 
 %files
 %doc DEVELOPMENT NEWS README
@@ -257,6 +264,10 @@ popd
 
 
 %changelog
+* Wed Apr 04 2018 Rex Dieter <rdieter@fedoraproject.org> - 1.1.6-4
+- Obsoletes: libkolab < 1.0.2-20
+- use %%ldconfig_scriptlets
+
 * Wed Feb 07 2018 Fedora Release Engineering <releng@fedoraproject.org> - 1.1.6-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild