diff --git a/Makefile.am b/Makefile.am
index c7c89ea..26dc4b6 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -6,7 +6,7 @@ system_includedir      = @SYSTEM_INCLUDEDIR@
 system_libdir          = @SYSTEM_LIBDIR@
 pkgconfigdir           = @PKGCONFIGDIR@
 
-AM_CFLAGS = -Wall -Wextra -Wformat=2 -std=gnu99
+AM_CFLAGS = -Wall -Wextra -Wformat=2 -std=gnu99 -DPKG_DEFAULT_PATH=\"$(pkgconfigdir)\" -DSYSTEM_INCLUDEDIR=\"$(system_includedir)\" -DSYSTEM_LIBDIR=\"$(system_libdir)\"
 
 bin_PROGRAMS = pkgconf
 lib_LTLIBRARIES = libpkgconf.la
diff --git a/configure.ac b/configure.ac
index c7788f5..64aa7d0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,6 +17,7 @@ AC_CONFIG_SRCDIR([main.c])
 AC_CONFIG_HEADERS([libpkgconf/config.h])
 AC_CHECK_FUNCS([strlcpy strlcat strndup strtok_r])
 AM_INIT_AUTOMAKE([foreign dist-xz subdir-objects])
+AM_SILENT_RULES([yes])
 LT_INIT
 
 AC_SYS_LARGEFILE
@@ -56,10 +57,6 @@ AC_ARG_WITH([system-includedir],[AC_HELP_STRING([--with-system-includedir],[spec
 
 AC_SUBST([SYSTEM_INCLUDEDIR])
 
-AC_DEFINE_UNQUOTED([SYSTEM_LIBDIR], "$SYSTEM_LIBDIR", [System library directory list])
-AC_DEFINE_UNQUOTED([SYSTEM_INCLUDEDIR], "$SYSTEM_INCLUDEDIR", [System include directory list])
-AC_DEFINE_UNQUOTED([PKG_DEFAULT_PATH], "$PKGCONFIGDIR", [Default PKG_CONFIG_PATH search list])
-
 AC_PROG_CPP
 AC_PROG_CC
 AC_PROG_INSTALL