diff --git a/common.mk b/common.mk
index 5c517b43d0..d35b2f3381 100644
--- a/common.mk
+++ b/common.mk
@@ -1288,7 +1288,8 @@ $(REVISION_H)$(yes_baseruby:yes=~disabled~):
 # uncommon.mk: $(REVISION_H)
 # $(MKFILES): $(REVISION_H)
 
-$(DOT_WAIT)ripper_srcs: $(RIPPER_SRCS)
+ripper_srcs: $(RIPPER_SRCS)
+.NOTPARALLEL: ripper_srcs
 
 $(RIPPER_SRCS): $(srcdir)/parse.y $(srcdir)/defs/id.def
 $(RIPPER_SRCS): $(srcdir)/ext/ripper/tools/preproc.rb $(srcdir)/ext/ripper/tools/dsl.rb
diff --git a/defs/gmake.mk b/defs/gmake.mk
index 62f6ce3e9e..4a91689de9 100644
--- a/defs/gmake.mk
+++ b/defs/gmake.mk
@@ -518,9 +518,7 @@ matz: up
 tags:
 	$(MAKE) GIT="$(GIT)" -C "$(srcdir)" -f defs/tags.mk
 
-ifneq ($(DOT_WAIT),)
-ripper_srcs: $(addprefix $(DOT_WAIT) ,$(RIPPER_SRCS))
-else
+ifeq ($(DOT_WAIT),)
 ripper_src =
 $(foreach r,$(RIPPER_SRCS),$(eval $(value r): | $(value ripper_src))\
 	$(eval ripper_src := $(value r)))