diff --git a/prism/srcs.mk b/prism/srcs.mk
index 565d793cc0..ff4ddff072 100644
--- a/prism/srcs.mk
+++ b/prism/srcs.mk
@@ -4,9 +4,8 @@ PRISM_CONFIG = $(PRISM_SRCDIR)/config.yml
 
 srcs uncommon.mk: prism/.srcs.mk.time
 
-prism/.srcs.mk.time:
+prism/.srcs.mk.time: $(order_only) $(PRISM_BUILD_DIR)/.time
 prism/$(HAVE_BASERUBY:no=.srcs.mk.time):
-	mkdir -p $(@D)
 	touch $@
 prism/$(HAVE_BASERUBY:yes=.srcs.mk.time): \
 		$(PRISM_SRCDIR)/templates/template.rb \
diff --git a/prism/srcs.mk.in b/prism/srcs.mk.in
index 0b921b7f0b..e337eff8ea 100644
--- a/prism/srcs.mk.in
+++ b/prism/srcs.mk.in
@@ -12,9 +12,8 @@ PRISM_CONFIG = $(PRISM_SRCDIR)/config.yml
 
 srcs <%=%><%=mk%>: prism/.srcs.mk.time
 
-prism/.srcs.mk.time:
+prism/.srcs.mk.time: $(order_only) $(PRISM_BUILD_DIR)/.time
 prism/$(HAVE_BASERUBY:no=.srcs.mk.time):
-	mkdir -p $(@D)
 	touch $@
 prism/$(HAVE_BASERUBY:yes=.srcs.mk.time): \
 		$(PRISM_SRCDIR)/templates/template.rb \