1 files changed, 1 insertions, 1 deletions
diff --git a/common.mk b/common.mk
index 1abef18031..531ba26daa 100644
--- a/common.mk
+++ b/common.mk
@@ -936,7 +936,7 @@ $(srcdir)/ext/ripper/ripper.c: parse.y
 $(srcdir)/ext/json/parser/parser.c: $(srcdir)/ext/json/parser/parser.rl
 	$(ECHO) generating $@
 	$(Q) $(CHDIR) $(@D) && $(exec) $(MAKE) -f prereq.mk $(MFLAGS) \
-		Q=$(Q) ECHO=$(ECHO) top_srcdir=../../.. srcdir=.
+		Q=$(Q) ECHO=$(ECHO) top_srcdir=../../.. srcdir=. VPATH=../../.. BASERUBY="$(BASERUBY)"
 
 $(srcdir)/ext/dl/callback/callback.c: $(srcdir)/ext/dl/callback/mkcallback.rb $(srcdir)/ext/dl/dl.h
 	$(ECHO) generating $@