diff --git a/make/projects-dir.mk b/make/projects-dir.mk
index 95d4d1df..fcac78b3 100644
--- a/make/projects-dir.mk
+++ b/make/projects-dir.mk
@@ -94,15 +94,24 @@ all: pull.done
 
 all: pull.done
 	$(BUILD_PY) $@ $(BUILD_PROJECTS)
+clean: clean-dirs done.clean
+distclean: clean-all-dirs done.clean
+install:
+	@echo
+	@echo "  Target install is not supported by this Makefile."
+	@echo "  make pkg-rebuild-reinstall might be what you are looking for."
+	@echo
+	@exit 1
 
 build-order: pull.done
 	$(BUILD_PY) order $(BUILD_PROJECTS) | sed 's/  */\n/g'
 
-clean: clean-dirs done.clean
-
 clean-dirs:
 	ls */dirs-started-all.done 2>/dev/null | sed 's%/.*%%' | xargs -r $(BUILD_PY) clean
 
+clean-all-dirs:
+	$(BUILD_PY) clean $(PROJECTS)
+
 echo-prereq-build:
 	@$(PROJECTS_PY) required-pkg --flavours "build" $(BUILD_PROJECTS)
 
@@ -257,8 +266,7 @@ cvsdir.done: ssh-wrapper.sh
 	touch $@
 
 cvs-update.done: cvsdir.done ssh-wrapper.sh
-	cvs update -dP Makefile jw-build
-	cvs update -dP $(shell $(CVS_ADMIN_SH) list-projects)
+	cvs update -dP Makefile $(shell $(CVS_ADMIN_SH) list-projects)
 	touch $@
 
 update.done: purge