Fix installation and removal of atd.service (#870)

SPECS/at/at.spec

@@ -2,7 +2,7 @@
 Summary:        Job spooling tools
 Name:           at
 Version:        3.1.23
-Release:        6%{?dist}
+Release:        7%{?dist}
 # http://packages.debian.org/changelogs/pool/main/a/at/current/copyright
 # + install-sh is MIT license with changes under Public Domain
 License:        GPLv3+ AND GPLv2+ AND ISC AND MIT AND Public Domain
@@ -38,6 +38,7 @@ BuildRequires:  flex-devel
 BuildRequires:  gcc
 BuildRequires:  libselinux-devel >= 1.27.9
 BuildRequires:  perl
+BuildRequires:  systemd
 Requires(post): systemd
 Requires(postun): systemd
 Requires(preun): systemd
@@ -124,8 +125,8 @@ mkdir -p %{buildroot}%{_sysconfdir}/sysconfig
 install -m 644 %{SOURCE3} %{buildroot}%{_sysconfdir}/sysconfig/atd
 
 # install systemd initscript
-mkdir -p %{buildroot}/%{_unitdir}/
-install -m 644 %{SOURCE5} %{buildroot}/%{_unitdir}/atd.service
+mkdir -p %{buildroot}/lib/systemd/system/
+install -m 644 %{SOURCE5} %{buildroot}/lib/systemd/system/atd.service
 
 # remove unpackaged files from the buildroot
 rm -r  %{buildroot}%{_prefix}/doc
@@ -174,9 +175,13 @@ chown root:root %{_localstatedir}/spool/at/.SEQ
 %{_bindir}/atrm
 %{_bindir}/atq
 %attr(4755,root,root) %{_bindir}/at
-%attr(0644,root,root) /%{_unitdir}/atd.service
+%attr(0644,root,root) /lib/systemd/system/atd.service
 
 %changelog
+* Mon Apr 19 2021 Nicolas Ontiveros <niontive@microsoft.com> - 3.1.23-7
+- Fix installation of atd.service
+- Add systemd to BR
+
 * Mon Nov 30 2020 Nicolas Ontiveros <niontive@microsoft.com> - 3.1.23-6
 - Initial CBL-Mariner import from Fedora 33 (license: MIT).
 - Use flex-devel in BR