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