copying synApps db's to my ioc app dir tree

['Dale L. Brewe' <brewe@pnc.aps.anl.gov>]

When I build my ioc applications I'd like to get the databases I use from 
synApps directories (e.g. stdApp) and install them under my ioc application 
tree. However, if I try this I get for example, the following error

gmake[3]: *** No rule to make target 
`/home/epics3/Appl/synApps_4_4/support/std1-2/stdApp/Db/userCalcs10.db-stamp', 
needed by `build'.  Stop.

if I include the line

DB += $(STD)/stdApp/Db/userCalcs10.db

in Makefile.Host in myApp/Db. The dir in the message from gmake is the 
correct directory for the database. I can  get databases in myApp/Db to 
install correctly if I include a 'DB += ...' in Makefile.Host. I'm using 
epics base 3.13.7
I'd appreciate it if someone could tell me what I'm doing wrong.
thanks
dale

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Dale L. Brewe     PNC-CAT/U. of Washington
  ph: 630 252 0582         fax: 630 252 0580
  Mail:
  Argonne National Laboratory
  Bldg 435E sector 20
  9700 S. Cass Ave.
  Argonne, IL 60439
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~