--- configure
+++ configure
@@ -2527,8 +2527,8 @@
   "") enable_ltdl_convenience=yes
       ac_configure_args="$ac_configure_args --enable-ltdl-convenience" ;;
   esac
-  LIBLTDL='${top_builddir}/''libltdl'/libltdlc.la
-  LTDLINCL='-I${top_srcdir}/''libltdl'
+  LIBLTDL="${LIBLTDL_PREFIX}/lib/libltdl.la"
+  LTDLINCL="-I${LIBLTDL_PREFIX}/include"
   # For backwards non-gettext consistent compatibility...
   INCLTDL="$LTDLINCL"