diff --git a/develop/ppl/ppl.conf b/develop/ppl/ppl.conf
index 8e247e8b0..51b56dac5 100644
--- a/develop/ppl/ppl.conf
+++ b/develop/ppl/ppl.conf
@@ -19,8 +19,8 @@ hook_add preconf 9 'autoreconf -vfis'
 # use the host g++ and the native libs and headers we have in tools.cross
 if atstage toolchain; then
 	export CXX=g++
-	export LDFLAGS="-Wl,-rpath,${root}${libdir}"
-	var_append SYSGCC_WRAPPER_INSERT " " "-I${root}${includedir}"
 	var_append extraconfopt ' ' "--with-gmp-lib=$( pkgprefix -r libdir gmp )"
 	var_append extraconfopt ' ' "--with-gmp-include=$( pkgprefix -r includedir gmp )"
+	var_append configprefix ' ' 'LDFLAGS="-Wl,-rpath,$( pkgprefix -r libdir gmp)"'
+	var_append configprefix ' ' 'CPPFLAGS="-I$( pkgprefix -r includedir gmp )"'
 fi