graphviz must not be used in fedora-20, otherise it never terminates

libpcscxx.spec.in

@@ -5,7 +5,10 @@ Release: @BUILD_NUMBER@%{?dist}
 License: LGPL
 Group: Development/Libraries/C++
 Source0: %{name}-%{version}.tar.gz
-BuildRequires: gnupg, subversion, automake, autoconf, doxygen, graphviz
+BuildRequires: gnupg, subversion, automake, autoconf, doxygen
+%if 0%{?fedora} != 20
+BuildRequires: graphviz
+%endif
 %if ( 0%{?suse_version} || 0%{?sles_version} ) && ( 0%{?suse_version} < 1200 ||  0%{?sles_version} < 1200 )
 BuildRequires: libp11-devel
 %else