Stackage nightly build failure for 4.9.6.0

[decentral1se]

src/Hakyll/Main.hs:73:19: error:
    • Variable not in scope:
        (<>) :: InfoMod a28 -> InfoMod a27 -> InfoMod Options
    • Perhaps you meant one of these:
        ‘<$>’ (imported from Options.Applicative),
        ‘<|>’ (imported from Options.Applicative),
        ‘<*>’ (imported from Options.Applicative)

src/Hakyll/Main.hs:113:44: error:
    • Variable not in scope: (<>) :: Mod f12 a26 -> Mod f11 a25 -> t2
    • Perhaps you meant one of these:
        ‘<$>’ (imported from Options.Applicative),
        ‘<|>’ (imported from Options.Applicative),
        ‘<*>’ (imported from Options.Applicative)

src/Hakyll/Main.hs:113:57: error:
    • Variable not in scope:
        (<>) :: t2 -> Mod f10 a24 -> Mod FlagFields Bool
    • Perhaps you meant one of these:
        ‘<$>’ (imported from Options.Applicative),
        ‘<|>’ (imported from Options.Applicative),
        ‘<*>’ (imported from Options.Applicative)

src/Hakyll/Main.hs:117:41: error:
    • Variable not in scope:
        (<>)
          :: Mod CommandFields Command
             -> Mod CommandFields Command -> Mod CommandFields Command
    • Perhaps you meant one of these:
        ‘<$>’ (imported from Options.Applicative),
        ‘<|>’ (imported from Options.Applicative),
        ‘<*>’ (imported from Options.Applicative)
(etc.)

[23Skidoo]

Just bumped into this.

[23Skidoo]

A workaround I've found is to constrain optparse-applicative to < 0.13.

[jaspervdj]

Thanks for reporting, seems like an easy fix. Looking at it now

[23Skidoo]

So it looks like efa148c in combination with https://github.com/pcapriotti/optparse-applicative/blob/master/CHANGELOG.md#version-01300-15-aug-2016 is the culprit. Apparently @aesadde tested his change with optparse-applicative 0.12.

[jaspervdj]

I've changed the import to a qualified one which is more robust in 85d9ccd

[mihaimaruseac]

This can be closed too, afaik.

[decentral1se]

Nice one folks!