diff -Naur xforms-1.2.3.orig/lib/Makefile.am xforms-1.2.3/lib/Makefile.am
--- xforms-1.2.3.orig/lib/Makefile.am	2019-02-24 12:53:58.340678373 +0000
+++ xforms-1.2.3/lib/Makefile.am	2019-02-24 12:54:33.096674102 +0000
@@ -25,7 +25,7 @@
 man_MANS = xforms.5
 
 xforms.5:
-	cp -p ./xforms.man xforms.5
+	cp -p $(srcdir)/xforms.man xforms.5
 
 libforms_la_SOURCES = \
 	align.c \