diff --git a/make/projects-dir.mk b/make/projects-dir.mk
index 65cfd899..58b23ca5 100644
--- a/make/projects-dir.mk
+++ b/make/projects-dir.mk
@@ -13,7 +13,7 @@ else
   CVS_PROJECTS = $(filter $(dir $(wildcard */CVS)),$(PROJECTS))
 endif
 
-EXCLUDE_FROM_BUILD = \
+EXCLUDE_FROM_BUILD += \
 	dspider-btools \
 	dspider-shared \
 	feedfs-dspcd \
@@ -40,6 +40,10 @@ else
   export PGIT_CLONE_FROM_USER = $(JANWARE_USER)
 endif
 
+ifneq ($(EXCLUDE_FROM_BUILD),)
+BUILD_PY_EXTRA_ARGS += --exclude "$(EXCLUDE_FROM_BUILD)"
+endif
+
 # ------------ commands
 
 MOD_SCRIPT_DIR = ./ytools/devutil/scripts