diff -up netdude-0.5.0/configure.in.path netdude-0.5.0/configure.in
--- netdude-0.5.0/configure.in.path	2008-08-28 15:58:22.000000000 +0200
+++ netdude-0.5.0/configure.in	2008-10-17 23:41:34.000000000 +0200
@@ -93,6 +93,21 @@ packagedatadir=`eval eval eval eval "ech
 AC_DEFINE_UNQUOTED(PACKAGE_DATA_DIR, "${packagedatadir}", [The data dir of the package])
 
 dnl ##################################################
+dnl # Set PACKAGE_LIB_DIR in config.h.
+dnl ##################################################
+if test "x${libdir}" = 'x${prefix}/lib'; then
+  if test "x${prefix}" = "xNONE"; then
+    packagelibdir="${ac_default_prefix}/lib/${PACKAGE}"
+  else
+    packagelibdir="${prefix}/lib/${PACKAGE}"
+  fi
+else
+  packagelibdir="${libdir}/${PACKAGE}"
+fi
+packagelibdir=`eval eval eval eval "echo $packagelibdir"`
+AC_DEFINE_UNQUOTED(PACKAGE_LIB_DIR, "${packagelibdir}", [The lib dir of the package])
+
+dnl ##################################################
 dnl # Set PACKAGE_SOURCE_DIR in config.h.
 dnl ##################################################
 packagesrcdir=`cd $srcdir && pwd`
diff -up netdude-0.5.0/plugins/BPF-Filter/Makefile.am.path netdude-0.5.0/plugins/BPF-Filter/Makefile.am
--- netdude-0.5.0/plugins/BPF-Filter/Makefile.am.path	2008-10-17 23:42:56.000000000 +0200
+++ netdude-0.5.0/plugins/BPF-Filter/Makefile.am	2008-10-17 23:43:17.000000000 +0200
@@ -7,7 +7,7 @@ LIBS                 =
 AM_LDFLAGS	     = -L$(top_srcdir)/src
 INCLUDES	     = @gtk_cflags@ @LIBNETDUDE_CFLAGS@ -I$(top_srcdir) -I$(top_srcdir)/libltdl -I$(top_srcdir)/src -W -Wall
 
-pkgdir		     = $(pkgdatadir)/$(version_major)/plugins
+pkgdir		     = $(pkglibdir)/$(version_major)/plugins
 
 pkg_LTLIBRARIES	     = nd_bpf.la
 
diff -up netdude-0.5.0/plugins/ChecksumFix/Makefile.am.path netdude-0.5.0/plugins/ChecksumFix/Makefile.am
--- netdude-0.5.0/plugins/ChecksumFix/Makefile.am.path	2008-10-17 23:42:56.000000000 +0200
+++ netdude-0.5.0/plugins/ChecksumFix/Makefile.am	2008-10-17 23:43:17.000000000 +0200
@@ -7,7 +7,7 @@ LIBS                 =
 AM_LDFLAGS	     = -L$(top_srcdir)/src
 INCLUDES	     = @gtk_cflags@ @LIBNETDUDE_CFLAGS@ -I$(top_srcdir) -I$(top_srcdir)/libltdl -I$(top_srcdir)/src -W -Wall
 
-pkgdir		     = $(pkgdatadir)/$(version_major)/plugins
+pkgdir		     = $(pkglibdir)/$(version_major)/plugins
 
 pkg_LTLIBRARIES	     = nd_cksumfix.la
 
diff -up netdude-0.5.0/plugins/Makefile.am.path netdude-0.5.0/plugins/Makefile.am
diff -up netdude-0.5.0/protocols/arp/Makefile.am.path netdude-0.5.0/protocols/arp/Makefile.am
--- netdude-0.5.0/protocols/arp/Makefile.am.path	2008-10-17 23:42:05.000000000 +0200
+++ netdude-0.5.0/protocols/arp/Makefile.am	2008-10-17 23:42:50.000000000 +0200
@@ -7,7 +7,7 @@ AM_LDFLAGS	     = -L$(top_srcdir)/src
 INCLUDES	     = @gtk_cflags@ @LIBNETDUDE_CFLAGS@ -I$(top_srcdir) \
                        -I$(top_srcdir)/libltdl -I$(top_srcdir)/src -W -Wall
 
-pkgdir		     = $(pkgdatadir)/$(version_major)/protocols
+pkgdir		     = $(pkglibdir)/$(version_major)/protocols
 pkgincludedir        = $(includedir)/netdude/$(version_major)/protocols/arp
 
 pkg_LTLIBRARIES	     = nd_arp.la 
diff -up netdude-0.5.0/protocols/ether/Makefile.am.path netdude-0.5.0/protocols/ether/Makefile.am
--- netdude-0.5.0/protocols/ether/Makefile.am.path	2008-10-17 23:42:05.000000000 +0200
+++ netdude-0.5.0/protocols/ether/Makefile.am	2008-10-17 23:42:50.000000000 +0200
@@ -7,7 +7,7 @@ AM_LDFLAGS	     = -L$(top_srcdir)/src
 INCLUDES	     = @gtk_cflags@ @LIBNETDUDE_CFLAGS@ -I$(top_srcdir) \
                        -I$(top_srcdir)/libltdl -I$(top_srcdir)/src -W -Wall
 
-pkgdir		     = $(pkgdatadir)/$(version_major)/protocols
+pkgdir		     = $(pkglibdir)/$(version_major)/protocols
 pkgincludedir        = $(includedir)/netdude/$(version_major)/protocols/ether
 
 pkg_LTLIBRARIES	     = nd_ethernet.la 
diff -up netdude-0.5.0/protocols/fddi/Makefile.am.path netdude-0.5.0/protocols/fddi/Makefile.am
--- netdude-0.5.0/protocols/fddi/Makefile.am.path	2008-10-17 23:42:05.000000000 +0200
+++ netdude-0.5.0/protocols/fddi/Makefile.am	2008-10-17 23:42:50.000000000 +0200
@@ -7,7 +7,7 @@ AM_LDFLAGS	     = -L$(top_srcdir)/src
 INCLUDES	     = @gtk_cflags@ @LIBNETDUDE_CFLAGS@ -I$(top_srcdir) \
                        -I$(top_srcdir)/libltdl -I$(top_srcdir)/src -W -Wall
 
-pkgdir		     = $(pkgdatadir)/$(version_major)/protocols
+pkgdir		     = $(pkglibdir)/$(version_major)/protocols
 pkgincludedir        = $(includedir)/netdude/$(version_major)/protocols/fddi
 
 pkg_LTLIBRARIES	     = nd_fddi.la 
diff -up netdude-0.5.0/protocols/icmp/Makefile.am.path netdude-0.5.0/protocols/icmp/Makefile.am
--- netdude-0.5.0/protocols/icmp/Makefile.am.path	2008-10-17 23:42:05.000000000 +0200
+++ netdude-0.5.0/protocols/icmp/Makefile.am	2008-10-17 23:42:50.000000000 +0200
@@ -7,7 +7,7 @@ AM_LDFLAGS	     = -L$(top_srcdir)/src
 INCLUDES	     = @gtk_cflags@ @LIBNETDUDE_CFLAGS@ -I$(top_srcdir) \
                        -I$(top_srcdir)/libltdl -I$(top_srcdir)/src -W -Wall
 
-pkgdir		     = $(pkgdatadir)/$(version_major)/protocols
+pkgdir		     = $(pkglibdir)/$(version_major)/protocols
 pkgincludedir        = $(includedir)/netdude/$(version_major)/protocols/icmp
 
 pkg_LTLIBRARIES	     = nd_icmp.la 
diff -up netdude-0.5.0/protocols/ip/Makefile.am.path netdude-0.5.0/protocols/ip/Makefile.am
--- netdude-0.5.0/protocols/ip/Makefile.am.path	2008-10-17 23:42:05.000000000 +0200
+++ netdude-0.5.0/protocols/ip/Makefile.am	2008-10-17 23:42:50.000000000 +0200
@@ -7,7 +7,7 @@ AM_LDFLAGS	     = -L$(top_srcdir)/src
 INCLUDES	     = @gtk_cflags@ @LIBNETDUDE_CFLAGS@ -I$(top_srcdir) \
                        -I$(top_srcdir)/libltdl -I$(top_srcdir)/src -W -Wall
 
-pkgdir		     = $(pkgdatadir)/$(version_major)/protocols
+pkgdir		     = $(pkglibdir)/$(version_major)/protocols
 pkgincludedir        = $(includedir)/netdude/$(version_major)/protocols/ip
 
 pkg_LTLIBRARIES	     = nd_ip.la 
diff -up netdude-0.5.0/protocols/linux-sll/Makefile.am.path netdude-0.5.0/protocols/linux-sll/Makefile.am
--- netdude-0.5.0/protocols/linux-sll/Makefile.am.path	2008-10-17 23:42:05.000000000 +0200
+++ netdude-0.5.0/protocols/linux-sll/Makefile.am	2008-10-17 23:42:50.000000000 +0200
@@ -7,7 +7,7 @@ AM_LDFLAGS	     = -L$(top_srcdir)/src
 INCLUDES	     = @gtk_cflags@ @LIBNETDUDE_CFLAGS@ -I$(top_srcdir) \
                        -I$(top_srcdir)/libltdl -I$(top_srcdir)/src -W -Wall
 
-pkgdir		     = $(pkgdatadir)/$(version_major)/protocols
+pkgdir		     = $(pkglibdir)/$(version_major)/protocols
 pkgincludedir        = $(includedir)/netdude/$(version_major)/protocols/linux-sll
 
 pkg_LTLIBRARIES	     = nd_sll.la 
diff -up netdude-0.5.0/protocols/Makefile.am.path netdude-0.5.0/protocols/Makefile.am
diff -up netdude-0.5.0/protocols/pcap/Makefile.am.path netdude-0.5.0/protocols/pcap/Makefile.am
--- netdude-0.5.0/protocols/pcap/Makefile.am.path	2008-10-17 23:42:05.000000000 +0200
+++ netdude-0.5.0/protocols/pcap/Makefile.am	2008-10-17 23:42:50.000000000 +0200
@@ -7,7 +7,7 @@ AM_LDFLAGS	     = -L$(top_srcdir)/src
 INCLUDES	     = @gtk_cflags@ @LIBNETDUDE_CFLAGS@ -I$(top_srcdir) \
                        -I$(top_srcdir)/libltdl -I$(top_srcdir)/src -W -Wall
 
-pkgdir		     = $(pkgdatadir)/$(version_major)/protocols
+pkgdir		     = $(pkglibdir)/$(version_major)/protocols
 pkgincludedir        = $(includedir)/netdude/$(version_major)/protocols/pcap
 
 pkg_LTLIBRARIES	     = nd_pcap.la 
diff -up netdude-0.5.0/protocols/snap/Makefile.am.path netdude-0.5.0/protocols/snap/Makefile.am
--- netdude-0.5.0/protocols/snap/Makefile.am.path	2008-10-17 23:42:05.000000000 +0200
+++ netdude-0.5.0/protocols/snap/Makefile.am	2008-10-17 23:42:50.000000000 +0200
@@ -7,7 +7,7 @@ AM_LDFLAGS	     = -L$(top_srcdir)/src
 INCLUDES	     = @gtk_cflags@ @LIBNETDUDE_CFLAGS@ -I$(top_srcdir) \
                        -I$(top_srcdir)/libltdl -I$(top_srcdir)/src -W -Wall
 
-pkgdir		     = $(pkgdatadir)/$(version_major)/protocols
+pkgdir		     = $(pkglibdir)/$(version_major)/protocols
 pkgincludedir        = $(includedir)/netdude/$(version_major)/protocols/snap
 
 pkg_LTLIBRARIES	     = nd_snap.la 
diff -up netdude-0.5.0/protocols/tcp/Makefile.am.path netdude-0.5.0/protocols/tcp/Makefile.am
--- netdude-0.5.0/protocols/tcp/Makefile.am.path	2008-10-17 23:42:05.000000000 +0200
+++ netdude-0.5.0/protocols/tcp/Makefile.am	2008-10-17 23:42:50.000000000 +0200
@@ -7,7 +7,7 @@ AM_LDFLAGS	     = -L$(top_srcdir)/src
 INCLUDES	     = @gtk_cflags@ @LIBNETDUDE_CFLAGS@ -I$(top_srcdir) \
                        -I$(top_srcdir)/libltdl -I$(top_srcdir)/src -W -Wall
 
-pkgdir		     = $(pkgdatadir)/$(version_major)/protocols
+pkgdir		     = $(pkglibdir)/$(version_major)/protocols
 pkgincludedir        = $(includedir)/netdude/$(version_major)/protocols/tcp
 
 pkg_LTLIBRARIES	     = nd_tcp.la 
diff -up netdude-0.5.0/protocols/udp/Makefile.am.path netdude-0.5.0/protocols/udp/Makefile.am
--- netdude-0.5.0/protocols/udp/Makefile.am.path	2008-10-17 23:42:05.000000000 +0200
+++ netdude-0.5.0/protocols/udp/Makefile.am	2008-10-17 23:42:50.000000000 +0200
@@ -7,7 +7,7 @@ AM_LDFLAGS	     = -L$(top_srcdir)/src
 INCLUDES	     = @gtk_cflags@ @LIBNETDUDE_CFLAGS@ -I$(top_srcdir) \
                        -I$(top_srcdir)/libltdl -I$(top_srcdir)/src -W -Wall
 
-pkgdir		     = $(pkgdatadir)/$(version_major)/protocols
+pkgdir		     = $(pkglibdir)/$(version_major)/protocols
 pkgincludedir        = $(includedir)/netdude/$(version_major)/protocols/udp
 
 pkg_LTLIBRARIES	     = nd_udp.la 
diff -up netdude-0.5.0/protocols/vlan/Makefile.am.path netdude-0.5.0/protocols/vlan/Makefile.am
--- netdude-0.5.0/protocols/vlan/Makefile.am.path	2008-10-17 23:42:05.000000000 +0200
+++ netdude-0.5.0/protocols/vlan/Makefile.am	2008-10-17 23:42:50.000000000 +0200
@@ -7,7 +7,7 @@ AM_LDFLAGS	     = -L$(top_srcdir)/src
 INCLUDES	     = @gtk_cflags@ @LIBNETDUDE_CFLAGS@ -I$(top_srcdir) \
                        -I$(top_srcdir)/libltdl -I$(top_srcdir)/src -W -Wall
 
-pkgdir		     = $(pkgdatadir)/$(version_major)/protocols
+pkgdir		     = $(pkglibdir)/$(version_major)/protocols
 pkgincludedir        = $(includedir)/netdude/$(version_major)/protocols/vlan
 
 pkg_LTLIBRARIES	     = nd_vlan.la 
diff -up netdude-0.5.0/src/nd_prefs.c.path netdude-0.5.0/src/nd_prefs.c
--- netdude-0.5.0/src/nd_prefs.c.path	2008-08-29 16:03:55.000000000 +0200
+++ netdude-0.5.0/src/nd_prefs.c	2008-10-17 23:41:34.000000000 +0200
@@ -82,7 +82,7 @@ nd_prefs_get_plugin_dir_global(void)
     return dir;
 
   g_snprintf(dir, MAXPATHLEN, "%s/%s/plugins",
-	     PACKAGE_DATA_DIR, VERSION_MAJOR);
+	     PACKAGE_LIB_DIR, VERSION_MAJOR);
 
   return dir;
 }
@@ -112,7 +112,7 @@ nd_prefs_get_proto_dir_global(void)
     return dir;
 
   g_snprintf(dir, MAXPATHLEN, "%s/%s/protocols",
-	     PACKAGE_DATA_DIR, VERSION_MAJOR);
+	     PACKAGE_LIB_DIR, VERSION_MAJOR);
 
   return dir;
 }