[Haskell-cafe] trying to install gutsy's libghc6-mtl-dev from source on feisty

[Anatoly Yakovenko]

i have ghc6_6.6.1-2ubuntu2_i386.deb and
ghc6-prof_6.6.1-2ubuntu2_i386.deb installed, but i cant seem to get
mtl to install, can someone tell me what this output means?   i just
switched to a debian based system from gentoo, so i dont grok dpkg
yet:

aeyakovenko at snowcrash:~$ sudo dpkg -i libghc6-mtl-dev_1.0.1-2_i386.deb
(Reading database ... 129709 files and directories currently installed.)
Preparing to replace libghc6-mtl-dev 1.0-3 (using
libghc6-mtl-dev_1.0.1-2_i386.deb) ...
ghc-pkg: cannot find package mtl-1.0
dpkg: warning - old pre-removal script returned error exit status 1
dpkg - trying script from the new package instead ...
ghc-pkg: cannot find package mtl-1.0
dpkg: error processing libghc6-mtl-dev_1.0.1-2_i386.deb (--install):
 subprocess new pre-removal script returned error exit status 1
Reading package info from stdin ... done.
ghc-pkg: dependency base-2.0 doesn't exist (use --force to override)
dpkg: error while cleaning up:
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 libghc6-mtl-dev_1.0.1-2_i386.deb