ntro@ntro-HP-dx2480-MT-NA121PA:~/Mukesh/assignment_haskell/work$ cabal install derive
Resolving dependencies...
<command line>: cannot satisfy -package Cabal-1.10.2.0: 
    Cabal-1.10.2.0-072fce39d68f011c6a364057a3d15270 is unusable due to missing or recursive dependencies:
      containers-0.3.0.0-ee442470d8dcc9e45f31677c400c5379
    (use -v for more information)
cabal: Error: some packages failed to install:
derive-2.5.4 depends on haskell-src-exts-1.11.1 which failed to install.
haskell-src-exts-1.11.1 failed during the configure step. The exception was:
ExitFailure 1

ntro@ntro-HP-dx2480-MT-NA121PA:~/Mukesh/assignment_haskell/work$ cabal install haskell-src-exts
Resolving dependencies...
<command line>: cannot satisfy -package Cabal-1.10.2.0: 
    Cabal-1.10.2.0-072fce39d68f011c6a364057a3d15270 is unusable due to missing or recursive dependencies:
      containers-0.3.0.0-ee442470d8dcc9e45f31677c400c5379
    (use -v for more information)
cabal: Error: some packages failed to install:
haskell-src-exts-1.11.1 failed during the configure step. The exception was:
ExitFailure 1

ntro@ntro-HP-dx2480-MT-NA121PA:~/Mukesh/assignment_haskell/work$ cabal install containers
Resolving dependencies...
No packages to be installed. All the requested packages are already installed.
If you want to reinstall anyway then use the --reinstall flag.

I tried to resolve this issue on #haskell and i got suggestion that it was due to conflict in

global and local namespace [ see here for more detail�http://hpaste.org/51376 ]. One idea is i

should wipe ~/.ghc and install all the libraries individually. Could some one please suggest if

there is another idea to resolve this issue. Currently i have ghc-6.12.3  and  installing�

ghc-7.0 will resolve the issue ?

Thank you

Mukesh Tiwari