Clean up cabal install deps.
Improve dotfiles.
Enable bash completion.
Catch up version.txt to what I'm actually on.
Change alias.
Switch from bash to zsh.
Improve zsh setup.
Fix bug.
Finally complete 'cabal install' setup.
Fix bug.
Previous fix did nothing, so reverting it.

Also, the problem is only with haskellPackages.yesodBin, not with
programs in general.