--- src/shaders/Makefile.am	2012-11-23 08:29:10.000000000 -0500
+++ src/shaders/Makefile.am.new	2014-01-30 18:38:27.954753460 -0500
@@ -25,7 +25,7 @@
 CLEANFILES += $(shaders_h)
 
 %.h: %.pso pso2h.py
-	$(PYTHON) pso2h.py -n $*_fp -o $@ $<
+	$(PYTHON) $(top_srcdir)/src/shaders/pso2h.py -n $*_fp -o $@ $<
 endif
 
 # Only add those targets if the Cg compiler is available