diff --git a/pam_krb5.spec b/pam_krb5.spec
index 4d460b9..07bee2b 100644
--- a/pam_krb5.spec
+++ b/pam_krb5.spec
@@ -6,6 +6,7 @@ Source0: https://fedorahosted.org/released/pam_krb5/pam_krb5-%{version}-1.tar.gz
 License: BSD or LGPLv2+
 Group: System Environment/Base
 URL: https://fedorahosted.org/pam_krb5/
+Conflicts: filesystem < 3
 BuildRequires: keyutils-libs-devel, krb5-devel, pam-devel
 # Needed by tests.
 # BuildRequires: krb5-server, krb5-workstation
@@ -20,7 +21,7 @@ The included pam_krb5afs module also gets AFS tokens if so configured.
 %setup -q -n pam_krb5-%{version}-1
 
 %build
-%configure --libdir=/%{_lib} \
+%configure --libdir=%{_libdir} \
 	--with-default-use-shmem="sshd" \
 	--with-default-external="sshd sshd-rekey gssftp" \
 	--with-default-multiple-ccaches="su su-l" \
@@ -29,8 +30,8 @@ make %{?_smp_mflags}
 
 %install
 make install DESTDIR=$RPM_BUILD_ROOT INSTALL="install -p"
-ln -s pam_krb5.so $RPM_BUILD_ROOT/%{_lib}/security/pam_krb5afs.so
-rm -f $RPM_BUILD_ROOT/%{_lib}/security/*.la
+ln -s pam_krb5.so $RPM_BUILD_ROOT%{_libdir}/security/pam_krb5afs.so
+rm -f $RPM_BUILD_ROOT%{_libdir}/security/*.la
 
 # Make the paths jive to avoid conflicts on multilib systems.
 sed -ri -e 's|/lib(64)?/|/\$LIB/|g' $RPM_BUILD_ROOT/%{_mandir}/man*/pam_krb5*.8*
@@ -46,9 +47,9 @@ sed -ri -e 's|/lib(64)?/|/\$LIB/|g' $RPM_BUILD_ROOT/%{_mandir}/man*/pam_krb5*.8*
 %defattr(-,root,root,-)
 %doc README* COPYING* ChangeLog NEWS
 %{_bindir}/*
-/%{_lib}/security/pam_krb5.so
-/%{_lib}/security/pam_krb5afs.so
-/%{_lib}/security/pam_krb5
+%{_libdir}/security/pam_krb5.so
+%{_libdir}/security/pam_krb5afs.so
+%{_libdir}/security/pam_krb5
 %{_mandir}/man1/*
 %{_mandir}/man5/*
 %{_mandir}/man8/*