Index: work/doc/distalign/Makefile
===================================================================
--- work/doc/distalign/Makefile	(revision 17976)
+++ work/doc/distalign/Makefile	(revision 17977)
@@ -10,7 +10,7 @@
 .POSIX:
 .SILENT:
 
-PREREQS := \
+PREREQS = \
 alignpix/Align[X,Centers,Average,Gridless].png \
 alignpix/Align[X,Centers,First,Gridless].png \
 alignpix/Align[X,Centers,Last,Gridless].png \