Hi Peter,
Hmm, what we would need is so that when haskell-pandoc is being built it's PKGFILE is updated so that it requires haskell-http 4000.0.9 exactly. Then an attempt to uninstall haskell-hp-http later would require an uninstallation of haskell-pandoc too.
fortunately, Pacman does that already: | # pacman -R haskell-http | checking dependencies... | error: failed to prepare transaction (could not satisfy dependencies) | :: haskell-pandoc: requires haskell-http>=4000.0.5 It's not possible to remove a package that another installed package depends on. It's a different story, though, when a prerequisite is updated. Suppose that pandoc has been installed. Now, an update of haskell-http shows up an AUR. Pacman will perform that update, and it will break pandoc in the process. This is why we have to bump pandoc's $pkgrel at the same time we publish the update of haskell-http. In other words, an update of package X requires $pkgrel bumps of all other packages that directly or indirectly depend on X. Take care, Peter