diff --git a/make/projects-dir.mk b/make/projects-dir.mk
index 2de40608..fade6269 100644
--- a/make/projects-dir.mk
+++ b/make/projects-dir.mk
@@ -83,7 +83,7 @@ endif
 
 export GIT_SSH := $(CVS_RSH)
 ifeq ($(filter pkg-%,$(MAKECMDGOALS)),)
-  export JW_BUILD_SSH_EXTRA_OPTS += -o ControlMaster=auto -o ControlPath=/tmp/%r@jw-build:%h:%p -o ControlPersist=3m -l $(JANWARE_USER)
+  export JW_BUILD_SSH_EXTRA_OPTS += -o StrictHostKeyChecking=no -o ControlMaster=auto -o ControlPath=/tmp/%r@jw-build:%h:%p -o ControlPersist=3m -l $(JANWARE_USER)
 endif
 
 ifneq ($(CLONE_FROM_USER),)