diff --git a/Makefile.am b/Makefile.am
index 619012d..dcc6d3c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,5 @@
 plugindir = $(PLUGIN_DIR)
+SESSION_BUS_SERVICES_DIR = $(prefix)/share/dbus-1/services
 plugin_PROGRAMS = xmonad-log-applet
 
 xmonad_log_applet_SOURCES = main.c
diff --git a/configure.ac b/configure.ac
index ad4cffb..110c953 100644
--- a/configure.ac
+++ b/configure.ac
@@ -27,28 +27,28 @@ AC_ARG_WITH(
 AS_IF(
     [test "x$panel" = xgnome2],
         [PKG_CHECK_MODULES(LIBPANEL, libpanelapplet-3.0 >= 2.32.0)]
-        LIBPANEL_APPLET_DIR=`$PKG_CONFIG --variable=prefix libpanelapplet-3.0`/share/gnome-panel/applets
-        PLUGIN_DIR=`$PKG_CONFIG --variable=prefix libpanelapplet-3.0`/libexec
+        LIBPANEL_APPLET_DIR=${prefix}/share/gnome-panel/applets
+        PLUGIN_DIR=${prefix}/libexec
         [AC_DEFINE(PANEL_GNOME, 1, [panel type])]
         [AC_DEFINE(PANEL_GNOME2, 1, [panel type])]
         ,
     [test "x$panel" = xgnome3],
         [PKG_CHECK_MODULES(LIBPANEL, libpanelapplet-4.0 >= 3.0.0)]
         LIBPANEL_APPLET_DIR=`$PKG_CONFIG --variable=libpanel_applet_dir libpanelapplet-4.0`
-        PLUGIN_DIR=`$PKG_CONFIG --variable=prefix libpanelapplet-4.0`/libexec
+        PLUGIN_DIR=${prefix}/libexec
         [AC_DEFINE(PANEL_GNOME, 1, [panel type])]
         [AC_DEFINE(PANEL_GNOME3, 1, [panel type])]
         ,
     [test "x$panel" = xmate],
         [PKG_CHECK_MODULES(LIBPANEL, libmatepanelapplet-3.0 >= 1.4.0)]
-        LIBPANEL_APPLET_DIR=`$PKG_CONFIG --variable=prefix libmatepanelapplet-3.0`/share/mate-panel/applets
-        PLUGIN_DIR=`$PKG_CONFIG --variable=prefix libmatepanelapplet-3.0`/libexec
+        LIBPANEL_APPLET_DIR=${prefix}/share/mate-panel/applets
+        PLUGIN_DIR=${prefix}/libexec
         [AC_DEFINE(PANEL_MATE, 1, [panel type])]
         ,
     [test "x$panel" = xxfce4],
         [PKG_CHECK_MODULES(LIBPANEL, libxfce4panel-1.0 >= 4.6.0)]
-        LIBPANEL_APPLET_DIR=`$PKG_CONFIG --variable=prefix libxfce4panel-1.0`/share/xfce4/panel-plugins
-        PLUGIN_DIR=`$PKG_CONFIG --variable=libdir libxfce4panel-1.0`/xfce4/panel/plugins
+        LIBPANEL_APPLET_DIR=${prefix}/share/xfce4/panel-plugins
+        PLUGIN_DIR=${prefix}/lib/xfce4/panel/plugins
         [AC_DEFINE(PANEL_XFCE4, 1, [panel type])]
         ,
     [AC_MSG_ERROR([Unknown panel type, use gnome2, gnome3, mate or xfce4])]