Troubles compiling pulp #13
Description
I'm having troubles compiling pulp on my Arch Linux machine:
[pulp]$ cabal install .
cabal: Could not resolve dependencies:
[__0] trying: pulp-0.0 (user goal)
[__1] next goal: regex-posix (dependency of pulp)
[__1] rejecting: regex-posix-0.96.0.0 (conflict: pulp => regex-posix>=0.95 &&
<0.96)
[__1] trying: regex-posix-0.95.2
[__2] next goal: base (dependency of pulp)
[__2] rejecting: base-4.13.0.0/installed-4.13.0.0 (conflict: regex-posix
+/-newbase +/-splitbase => base<4.13)
[__2] rejecting: base-4.12.0.0, base-4.11.1.0, base-4.11.0.0, base-4.10.1.0,
base-4.10.0.0, base-4.9.1.0, base-4.9.0.0, base-4.8.2.0, base-4.8.1.0,
base-4.8.0.0, base-4.7.0.2, base-4.7.0.1, base-4.7.0.0, base-4.6.0.1,
base-4.6.0.0, base-4.5.1.0, base-4.5.0.0, base-4.4.1.0, base-4.4.0.0,
base-4.3.1.0, base-4.3.0.0, base-4.2.0.2, base-4.2.0.1, base-4.2.0.0,
base-4.1.0.0, base-4.0.0.0, base-3.0.3.2, base-3.0.3.1 (constraint from
non-upgradeable package requires installed instance)
[__2] fail (backjumping, conflict set: base, pulp, regex-posix)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: base, pulp, regex-posix
Versions of regex-posix <0.96 have a bound on base <4.13, but the GHC I got in both cases is version 8.8.3 and base-4.13.0.0.
Tried removing the regex-posix <0.96 bound, but then things fail:
bin/Config.hs:318:9: error:
• No instance for (MonadFail (Either [String]))
arising from a do statement
with the failable pattern ‘Regex r’
• In a stmt of a 'do' block: Regex r <- satisfy "a regex" isRegex
In the expression:
do Regex r <- satisfy "a regex" isRegex
return . Atom . f $ r
In an equation for ‘regex’:
regex f
= do Regex r <- satisfy "a regex" isRegex
return . Atom . f $ r
|
318 | Regex r <- satisfy "a regex" isRegex
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
So I tried downgrading GHC to 8.6.1 (from Sept 2018), thus base 4.12.
ghcup install 8.6.1
ghcup set 8.6.1
However, even this doesn't seem enough. This installs regex-posix-0.95.2, which causes the build of pulp to fail in the same way as 0.96.0.0:
[pulp]$ cabal install .
[...]
Completed regex-posix-0.95.2 (all, legacy fallback)
[...]
bin/Config.hs:318:9: error:
• No instance for (Control.Monad.Fail.MonadFail (Either [String]))
arising from a do statement
with the failable pattern ‘Regex r’
• In a stmt of a 'do' block: Regex r <- satisfy "a regex" isRegex
In the expression:
do Regex r <- satisfy "a regex" isRegex
return . Atom . f $ r
In an equation for ‘regex’:
regex f
= do Regex r <- satisfy "a regex" isRegex
return . Atom . f $ r
|
318 | Regex r <- satisfy "a regex" isRegex
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Unfortunately regex-posix-0.95.1 would require base<4.6, so GHC 7.4.2 (Jun 2012). There's no way I can still go back so much back in time, sorry.