unset GHC_PACKAGE_PATH for cabal-install

unset GHC_PACKAGE_PATH for cabal-install

[Mekeor Melire]

How to use cabal-install in GuixSD? `cabal install` leads to an error
saying its incompatible with GHC_PACKAGE_PATH variable:

$ cabal install hascal
Config file path source is default config file.
Config file /home/mekeor/.cabal/config not found.
Writing default configuration to /home/mekeor/.cabal/config
cabal: Use of GHC's environment variable GHC_PACKAGE_PATH is
 incompatible with Cabal. Use the flag --package-db to specify a
 package database (it can be used multiple times).

So, my question is: Is it fine, to just temporarily `unset
GHC_PACKAGE_PATH` variable before running cabal-install? What's the
disadvantage?

Re: unset GHC_PACKAGE_PATH for cabal-install

[Ludovic Courtès]

Hi Mekeor,

I’ll let Haskell-savvy people answer your question, but my suggestion
would be to consider using Guix instead of Cabal.  :-)

There’s currently 275 Haskell packages in Guix, ‘guix import’ should be
able to help you add more, and ‘guix refresh’ can update the existing
ones.

My 2¢,
Ludo’.