diff --git a/src/Makefile.in b/src/Makefile.in
index dda9403e3..be035a13f 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -46,6 +46,10 @@ export OBJCACHE_JOBS := -j $(shell objcache --jobs "$(OBJCACHE_HOSTS)")
 export OBJCACHE := @objcache --read --write
 endif
 
+UNDER_GIT = $(wildcard ../.git)
+
+#*********************************************************************
+
 obj_opt:
 	mkdir $@
 obj_dbg:
@@ -71,7 +75,7 @@ dbg: ../verilator_bin_dbg
 
 prefiles::
 
-ifeq ($(VERILATOR_AUTHOR_SITE),1)	# Local... Else don't burden users
+ifneq ($(UNDER_GIT),)	# If local git tree... Else don't burden users
 prefiles:: config_rev.h
 # This output goes into srcdir, as we need to distribute it as part of the kit.
 config_rev.h:	config_rev.pl ../.git/index