maximus wrote:you'll probably have to replace any references to $pkgver in the build section with the original value of 0.5.1-2.
You got it right with the source, change cd $startdir/src/$pkgname-$pkgver
to cd $startdir/src/$pkgname-0.5.1-2
and see if it works.
Edit: Generally, when you download the source for a program in compressed format (e.g. tar.gz), the source will be contained in a folder inside the compressed file that reads the same as the name of the compressed file. In this case the compressed file is iptux-0.5.1-2.tar.gz
so the source should
be contained inside the folder iptux-0.5.1-2
. This isn't always the case however, so the easiest thing to do is open up the source file in File Roller and check.