diff --git a/.cirrus.yml b/.cirrus.yml
index 67b89c47..c01f59c9 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -14,4 +14,4 @@ task:
       - EMULATOR: pdp10-ka
       # EMULATOR: pdp10-kl
   install_script: sh -ex build/dependencies.sh install_freebsd
-  script: gmake all EMULATOR=$EMULATOR
+  script: gmake its EMULATOR=$EMULATOR
diff --git a/Makefile b/Makefile
index 496ca654..a77a521b 100644
--- a/Makefile
+++ b/Makefile
@@ -80,22 +80,36 @@ DUMP=$(shell cd src; ls syseng/dump.* sysnet/netwrk.*)
 SMF:=$(addprefix tools/,$(addsuffix /.gitignore,$(SUBMODULES)))
 OUT=out/$(EMULATOR)
 
-all: $(SMF) $(OUT)/stamp tools/supdup/supdup
+all: its $(OUT)/emulators tools/supdup/supdup
+
+its: $(SMF) $(OUT)/stamp
 
 check: all check-dirs
 
 out/klh10/stamp: $(OUT)/rp0.dsk
 	$(TOUCH) $@
 
-out/simh/stamp: $(OUT)/rp0.dsk $(GT40)
+out/klh10/emulators:
 	$(TOUCH) $@
 
-out/pdp10-ka/stamp: $(OUT)/rp03.2 $(OUT)/rp03.3 $(GT40) $(TV11) $(PDP6) $(DATAPOINT) $(VT52) $(TEK)
+out/simh/stamp: $(OUT)/rp0.dsk
+	$(TOUCH) $@
+
+out/simh/emulators: $(GT40)
+	$(TOUCH) $@
+
+out/pdp10-ka/stamp: $(OUT)/rp03.2 $(OUT)/rp03.3
+	$(TOUCH) $@
+
+out/pdp10-ka/emulators: $(GT40) $(TV11) $(PDP6) $(DATAPOINT) $(VT52) $(TEK)
 	$(TOUCH) $@
 
 out/pdp10-kl/stamp: $(OUT)/rp04.1
 	$(TOUCH) $@
 
+out/pdp10-kl/emulators:
+	$(TOUCH) $@
+
 $(OUT)/rp0.dsk: build/simh/init $(OUT)/minsys.tape $(OUT)/minsrc.tape $(OUT)/salv.tape $(OUT)/dskdmp.tape build/build.tcl $(OUT)/sources.tape build/$(EMULATOR)/stamp
 	PATH="$(CURDIR)/tools/simh/BIN:$$PATH" expect -f build/$(EMULATOR)/build.tcl $(IP) $(GW)