I don't believe so, because flags are set on a module basis and you need more granular control.

Having been in your situation many times, what I often do is to define a cabal flag called "development" and in my ghc-options stanza I write:

if flag(development)
  ghc-options: -Wno-unused-imports -Wno-unused-packages

Then during CI I disable this flag.

Cheers,
Hécate

Hello,

I would like to  set -Wno-unused-imports for only one import,

is it possible and how to do it ?

thanks for your advices.

Frederic
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Hécate ✨
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