[tex-live] double installation | dblatex | docbook.sty not found

[Urs Liska]

Hi all,

I'm having an issue which is probably related to path searching.

I have TL 2013 installed from the web installer. It resides in a local 
dir (i.e. in my user dir).
For some dependencies (apt-get build-dep lilypond) I additionally had to 
install it through apt-get from the Debian repositories. But my paths 
are set so the web installation is used.
Additionally I've installed dblatex through apt-get.

Now when running a build script this fails at the command "dblatex 
somefile.tex" with the message "docbook.sty" not found.

tlmgr update dblatex tells me it is up to date.
dblatex is found in /usr/bin.

Somehow I have the impression my manually installed TeXLive and the 
apt-get dblatex don't cooperate well.

Any ideas what I could check?

TIA
Urs