--- Makefile.am.orig	2020-04-24 15:51:47 UTC
+++ Makefile.am
@@ -26,7 +26,7 @@ endif
   CK_DIR = third_party/concurrency_kit
 endif
 
-SUBDIRS = doc $(LUAJIT_DIR) $(CK_DIR) src tests
+SUBDIRS = $(LUAJIT_DIR) $(CK_DIR) src tests
 
 EXTRA_DIST = autogen.sh README.md README-WIN.txt README-Oracle.md ChangeLog \
              snap/snapcraft.yaml.in third_party/cram \
