diff -ru -x CVS pkgsrc-cvs/graphics/MesaDemos/Makefile pkgsrc/graphics/MesaDemos/Makefile
--- pkgsrc-cvs/graphics/MesaDemos/Makefile	2017-08-28 16:11:01.209715766 +0200
+++ pkgsrc/graphics/MesaDemos/Makefile	2017-08-28 16:47:04.385608170 +0200
@@ -30,4 +30,5 @@
 .include "../../graphics/glew/buildlink3.mk"
 .include "../../graphics/glu/buildlink3.mk"
 .include "../../graphics/glut/buildlink3.mk"
+.include "../../security/libgcrypt/buildlink3.mk"
 .include "../../mk/bsd.pkg.mk"