--- old/make/autoconf/spec.gmk.in	2018-02-17 00:00:55.039212532 +0100
+++ new/make/autoconf/spec.gmk.in	2018-02-17 00:00:54.823212534 +0100
@@ -685,6 +685,7 @@
 PANDOC:=@FIXPATH@ @PANDOC@
 PATCH:=@PATCH@
 PRINTF:=@PRINTF@
+READLINK:=@READLINK@
 RM:=@RM@
 RMDIR:=@RMDIR@
 SED:=@SED@