diff --git a/make/cfg_dev.mk b/make/cfg_dev.mk
index eaa31ee3..dd640374 100644
--- a/make/cfg_dev.mk
+++ b/make/cfg_dev.mk
@@ -4,9 +4,9 @@
 # $Id$
 
 #CONTRIBDIR       = $(TOPDIR)/contrib
-PREFIX           = $(HOME)/dat/test/$(PROJECT)-$(YTOOLS_VERSION)
-VAR_PREFIX       = $(PREFIX)/var
-DOC_PREFIX       = $(PREFIX)/doc/$(PROJECT)
+PREFIX           = $(ENV_PREFIX)/$(HOME)/dat/test/$(PROJECT)-$(VERSION)
+VAR_PREFIX       = $(ENV_PREFIX)/$(PREFIX)/var
+DOC_PREFIX       = $(ENV_PREFIX)/$(PREFIX)/doc/$(PROJECT)
 EXEGROUP         = $(shell id -gn)
 EXEOWNER         = $(shell whoami)
 EXEMODE          = 770