pkg_add with a) dubious packages and b) multiple packages

[Peter]

On my 4.0 STABLE box I am trying to use pkg_add to install multiple packages 
with one command:

pkg_add -vi cabextract \
         colortail \
         db \
         expiretable \
         gnupg \
         gtar \
         ncftp \
         p0f \
         unzip \
         wget \
         zap

but I have found that if a package is dubiously named (such as "db") then it 
hangs with:

"Ambiguous: db could be db-3.1.17p6 db-4.2.52p8"

If I go:

pkg_add -vi db

then I get:

Ambiguous: db could be db-3.1.17p6 db-4.2.52p8
Choose one package
         0: <None>
         1: db-3.1.17p6
         2: db-4.2.52p8
Your choice:


Any ideas?

Pedro