* bug#37064: Ghc 8.6.5 fails to find core package database
@ 2019-08-17 15:21 Gabriel Giamarchi
2019-08-22 19:26 ` Timothy Sample
0 siblings, 1 reply; 3+ messages in thread
From: Gabriel Giamarchi @ 2019-08-17 15:21 UTC (permalink / raw)
To: 37064
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
package.conf.d, but
instead ghc 8.4.3's database.
Note: Not setting this variable leads to a working ghc (will search in
default
location), but is required to install additional packages via guix.
The issue might come from guix/profiles.scm:812, since
(module-ref (resolve-interface '(gnu packages haskell)) 'ghc)
evaluates to <package ghc@8.4.3 gnu/packages/haskell.scm:445> in my repl.
^ permalink raw reply [flat|nested] 3+ messages in thread
* bug#37064: Ghc 8.6.5 fails to find core package database
2019-08-17 15:21 bug#37064: Ghc 8.6.5 fails to find core package database Gabriel Giamarchi
@ 2019-08-22 19:26 ` Timothy Sample
2019-09-10 2:05 ` Timothy Sample
0 siblings, 1 reply; 3+ messages in thread
From: Timothy Sample @ 2019-08-22 19:26 UTC (permalink / raw)
To: Gabriel Giamarchi; +Cc: 37064
Hi Gabriel,
Gabriel Giamarchi <gabrielg@student.ethz.ch> writes:
> 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
> package.conf.d, but
> instead ghc 8.4.3's database.
Ouch!
> Note: Not setting this variable leads to a working ghc (will search in
> default
> location), but is required to install additional packages via guix.
>
> The issue might come from guix/profiles.scm:812, since
> (module-ref (resolve-interface '(gnu packages haskell)) 'ghc)
> evaluates to <package ghc@8.4.3 gnu/packages/haskell.scm:445> in my repl.
Good catch. I can confirm this is the issue, but I’m not sure how to
fix it. We could try to find GHC from the profile rather than
unconditionally using a certain package. However, that would not help
if someone were to install GHC 8.4 and 8.6 in the same profile.
-- Tim
^ permalink raw reply [flat|nested] 3+ messages in thread
* bug#37064: Ghc 8.6.5 fails to find core package database
2019-08-22 19:26 ` Timothy Sample
@ 2019-09-10 2:05 ` Timothy Sample
0 siblings, 0 replies; 3+ messages in thread
From: Timothy Sample @ 2019-09-10 2:05 UTC (permalink / raw)
To: Gabriel Giamarchi; +Cc: 37064-done
Hi again,
Timothy Sample <samplet@ngyro.com> writes:
> Gabriel Giamarchi <gabrielg@student.ethz.ch> writes:
>
>> 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
>> package.conf.d, but
>> instead ghc 8.4.3's database.
>>
>> Note: Not setting this variable leads to a working ghc (will search in
>> default
>> location), but is required to install additional packages via guix.
>>
>> The issue might come from guix/profiles.scm:812, since
>> (module-ref (resolve-interface '(gnu packages haskell)) 'ghc)
>> evaluates to <package ghc@8.4.3 gnu/packages/haskell.scm:445> in my repl.
>
> Good catch. I can confirm this is the issue, but I’m not sure how to
> fix it. We could try to find GHC from the profile rather than
> unconditionally using a certain package. However, that would not help
> if someone were to install GHC 8.4 and 8.6 in the same profile.
I took another look at this and we were wrong! The main issue here is
that I made a mistake in the GHC 8.6 package definition, and it was
setting GHC_PACKAGE_PATH incorrectly. This should be fixed as of commit
83aa656217. Sorry for the trouble.
Note that you will likely run into trouble trying to use other
Guix-provided Haskell packages with GHC 8.6, as they are all built with
GHC 8.4. AFAIU, this is not something that GHC supports.
-- Tim
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2019-09-10 2:06 UTC | newest]
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2019-08-17 15:21 bug#37064: Ghc 8.6.5 fails to find core package database Gabriel Giamarchi
2019-08-22 19:26 ` Timothy Sample
2019-09-10 2:05 ` Timothy Sample
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