--- embedaddon/bird/doc/Makefile	2017/08/22 12:33:54	1.1.1.1
+++ embedaddon/bird/doc/Makefile	2021/03/17 19:50:23	1.1.1.2
@@ -8,11 +8,13 @@ srcdir=$(shell cd $(root-rel) ; pwd)
 srcdir_abs=$(srcdir)
 endif
 
+export TEXINPUTS := $(TEXINPUTS):$(srcdir_abs)/doc/tex
+
 # Force rebuilds
 .PHONY: prog.sgml bird.sgml
 
 docs: progdocs userdocs
-progdocs: prog.html prog.ps
+progdocs: prog.html prog.pdf
 userdocs: bird.html bird.pdf
 
 prog.sgml: