diff --git a/pki-ocsp.spec b/pki-ocsp.spec
index 2eaffb3..fd4fe27 100644
--- a/pki-ocsp.spec
+++ b/pki-ocsp.spec
@@ -12,7 +12,7 @@ BuildRoot:        %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
 # specify '_unitdir' macro for platforms that don't use 'systemd'
 %if 0%{?rhel} || 0%{?fedora} < 16
-%define           _unitdir /lib/systemd/system
+%define           _unitdir %{_unitdir}
 %endif
 
 BuildRequires:    cmake
@@ -40,6 +40,8 @@ Requires:         pki-selinux >= 9.0.15
 Requires(post):   systemd-units
 Requires(preun):  systemd-units
 Requires(postun): systemd-units
+Conflicts:        systemd < 38
+Conflicts:        filesystem < 3
 %else
 %if 0%{?fedora} >= 15
 Requires:         pki-common
@@ -120,6 +122,8 @@ Additionally, Certificate System requires ONE AND ONLY ONE of the following
 
 
 %setup -q
+# FIXME
+sed -i -e 's#/lib/systemd/system#%{_unitdir}#g' cmake/Modules/DefineInstallationPaths.cmake
 
 
 %clean
@@ -183,7 +187,7 @@ fi
 if [ -d /etc/sysconfig/pki/ocsp ]; then
     for inst in `ls /etc/sysconfig/pki/ocsp`; do
         if [ ! -e "/etc/systemd/system/pki-ocspd.target.wants/pki-ocspd@${inst}.service" ]; then
-            ln -s "/lib/systemd/system/pki-ocspd@.service" \
+            ln -s "%{_unitdir}/pki-ocspd@.service" \
                   "/etc/systemd/system/pki-ocspd.target.wants/pki-ocspd@${inst}.service"
             [ -L /var/lib/${inst}/${inst} ] && unlink /var/lib/${inst}/${inst}
             ln -s /usr/sbin/tomcat6-sysd /var/lib/${inst}/${inst}