Combining databases from packages installed with cabal install

Hi.

I'm configuring haddock via cabal install (see [0]) to build the
hoogle database.  The database is being installed in
~/.cabal/share/doc/$package-$version/html/$package.txt, but is not
being combined with the default database.  That is, if right after the
installation I try to search with the hoogle command for some a
function, it will not work.  I wrote the following script, which I
called cabal-install:

    #!/bin/sh

    set -e
    set -x

    cabal \
        install \
        --enable-documentation \
        --enable-library-profiling \
        --haddock-hyperlink-source \
        --haddock-hoogle \
        --haddock-html \
        "$ <at> "

    cd ~/.cabal/share/hoogle-4.2.13/databases/
    for file in ~/.cabal/share/doc/*/html/*.txt
    do
        hoo=`echo $file | sed 's/.txt$/.hoo/;s#.*/##'`
        if [ ! -f $hoo ]
        then