From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gabriel Giamarchi <gabrielg@student.ethz.ch>
Subject: bug#37064: Ghc 8.6.5 fails to find core package database
Date: Sat, 17 Aug 2019 17:21:08 +0200
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To: 37064@debbugs.gnu.org

Installing only 'ghc 8.6.5' (Glasgow Haskell compiler) and sourcing

'~/.guix-profile/etc/profile' leads to ghc not finding core modules.
('ghci' doesn't find System.IO for instance).

This is due to $GHC_PACKAGE_PATH not containing ghc 8.6.5's=20
package.conf.d, but
instead ghc 8.4.3's database.
Note: Not setting this variable leads to a working ghc (will search in=20
default
location), but is required to install additional packages via guix.

The issue might come from guix/profiles.scm:812, since
 =C2=A0 (module-ref (resolve-interface '(gnu packages haskell)) 'ghc)
evaluates to <package ghc@8.4.3 gnu/packages/haskell.scm:445> in my repl.