[arch-haskell] Error installing haskell-http, XMonad etc.

[AbdulSattar Mohammed]

When I run
sudo pacman -S xmonad

I get this error:

warning: xmonad-0.10-3 is up to date -- reinstalling
resolving dependencies...
looking for inter-conflicts...

Targets (1): xmonad-0.10-3

Total Installed Size:   6.82 MiB
Net Upgrade Size:       0.00 MiB

Proceed with installation? [Y/n]
(1/1) checking package integrity
[#######################################] 100%
(1/1) loading package files
 [#######################################] 100%
(1/1) checking for file conflicts
 [#######################################] 100%
(1/1) checking available disk space
 [#######################################] 100%
ghc-pkg: cannot find package xmonad-0.10
error: command failed to execute correctly
(1/1) upgrading xmonad
[#######################################] 100%
Reading package info from stdin ... done.
xmonad-0.10: Warning: haddock-interfaces:
/usr/share/doc/xmonad-0.10/html/xmonad.haddock doesn't exist or isn't a file
xmonad-0.10: Warning: haddock-html: /usr/share/doc/xmonad-0.10/html doesn't
exist or isn't a directory
xmonad-0.10: dependency "X11-1.5.0.1-23969a606024c8baf35a42f59a8da104"
doesn't exist (use --force to override)
xmonad-0.10: dependency "mtl-2.0.1.0-db19dd8a7700e3d3adda8aa8fe5bf53d"
doesn't exist (use --force to override)
xmonad-0.10: dependency
"utf8-string-0.3.7-ca3bc669f78a10f8e42ef22439bcf83c" doesn't exist (use
--force to override)
error: command failed to execute correctly

I get similar errors when I try to install
haskell-http,mtl,network,parsec,random,text,transformers etc. These are all
the packages that I installed previously, which worked fine and I somehow
removed them. I don't know how I did that. They do not show up in ghc-pkg
list. And that is the error that's being reported. From the above message I
gather that these packages are not actually installed, pacman thinks they
are and ghc thinks they are not. I should make pacman think they are not
installed and reinstall them again.

Or it might be other way around. They *are* actually present (most probably
indicated by the Net Upgrade Size: 0.00 MiB). Pacman could be right but
those packages are not registered with ghc. Then I should find a way to
register those packages with ghc. I think, the register.sh, unregister.sh
in /usr/share/haskell folder allow me to do that. But before I realized
this, I deleted the whole folder thinking it'd regenerate itself when I
install them again. I know that was stupid.

I tried removing those packages using pacman -R haskell-http etc. They
won't get removed. Same error.

I have one solution in mind, install cabal-install and install all those
packages via cabal-install. Then, they'd get registered with ghc-pkg and
removing them or reinstalling them via pacman would be possible. But I'm
sure there's a better way. Can you tell me which one it is?

P.S: I think (I'm not sure) this situation got created when I ran pacman -S
ghc after I installed all these pacakges. Could this be the problem or I'm
talking nonsense?


-- 
Warm Regards,

AbdulSattar Mohammed
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