Comment 79 for bug 150193

> I managed to go as far as downloading the source and applying the patch
> however when I am having troubles rebuilding the package. I gave it up
> for today but will try again tomorrow.
>
> Thanks again for yr guidance.

There are explanation in bug #173890. I put these bellow (the package
should be updated) :

Instead of adding the -d option to dpkg-buildpackage you can do the
following command before anything else (this installs the required
dependencies).

sudo apt-get build-dep flashplugin-nonfree

That downloads and installs all of the dependencies for the flash plugin
(including development dependencies).

So the corrected instructions would be:

sudo apt-get build-dep flashplugin-nonfree
wget http://launchpadlibrarian.net/10756602/flashplugin-nonfree_9.0.115.0ubuntu2.tar.gz
tar -zxvf flashplugin-nonfree_9.0.115.0ubuntu2.tar.gz
cd flashplugin-nonfree-9.0.115.0ubuntu2
dpkg-buildpackage -b -rfakeroot