Use _udevrulesdir macro.

libgphoto2.spec

@@ -3,7 +3,7 @@
 Summary: Library for accessing digital cameras
 Name: libgphoto2
 Version: 2.5.1.1
-Release: 1%{?dist}
+Release: 2%{?dist}
 # GPLV2+ for the main lib (due to exif.c) and most plugins, some plugins GPLv2
 License: GPLv2+ and GPLv2
 Group: Development/Libraries
@@ -22,6 +22,7 @@ BuildRequires: libjpeg-devel
 BuildRequires: pkgconfig, sharutils
 BuildRequires: libtool-ltdl-devel, popt-devel
 BuildRequires: gd-devel
+BuildRequires: systemd
 Obsoletes: gphoto2 < 2.4.0-11
 Obsoletes: gphoto2-devel < 2.4.0-11
 
@@ -112,10 +113,8 @@ export LD_LIBRARY_PATH=$RPM_BUILD_ROOT%{_libdir}
 # Output udev rules for device identification; this is used by GVfs gphoto2
 # backend and others.
 #
-# Btw, since it's /lib/udev, never e.g. /lib64/udev, we hardcode the path
-#
-mkdir -p $RPM_BUILD_ROOT%{udevdir}/rules.d
-$RPM_BUILD_ROOT%{_libdir}/%{name}/print-camera-list udev-rules version 136 > $RPM_BUILD_ROOT%{udevdir}/rules.d/40-libgphoto2.rules
+mkdir -p $RPM_BUILD_ROOT%{_udevrulesdir}
+$RPM_BUILD_ROOT%{_libdir}/%{name}/print-camera-list udev-rules version 136 > $RPM_BUILD_ROOT%{_udevrulesdir}/40-libgphoto2.rules
 popd
 
 # remove circular symlink in /usr/include/gphoto2 (#460807)
@@ -146,7 +145,7 @@ rm -rf "${RPM_BUILD_ROOT}"
 %{_libdir}/libgphoto2_port/*/*.so
 %{_libdir}/libgphoto2/*/*.so
 %{_libdir}/*.so.*
-%{udevdir}/rules.d/40-libgphoto2.rules
+%{_udevrulesdir}/40-libgphoto2.rules
 %{udevdir}/check-ptp-camera
 
 %post -p /sbin/ldconfig
@@ -165,6 +164,9 @@ rm -rf "${RPM_BUILD_ROOT}"
 %{_mandir}/man3/*
 
 %changelog
+* Tue Apr 23 2013 Tim Waugh <twaugh@redhat.com> 2.5.1.1-2
+- Use _udevrulesdir macro.
+
 * Tue Feb 19 2013 Jindrich Novy <jnovy@redhat.com> 2.5.1.1-1
 - update to 2.5.1.1