--- a/make/autoconf/spec.gmk.in	Sun Feb 18 17:06:20 2018 -0800
+++ b/make/autoconf/spec.gmk.in	Mon Feb 19 10:57:05 2018 +0100
@@ -685,6 +685,7 @@
 PANDOC:=@FIXPATH@ @PANDOC@
 PATCH:=@PATCH@
 PRINTF:=@PRINTF@
+READLINK:=@READLINK@
 RM:=@RM@
 RMDIR:=@RMDIR@
 SED:=@SED@