cabal-version: 2.2
name: foo
version: 0
license: NONE

library
    
    if impl(ghc >=8.2)
        
        if impl(ghc >=8.4)
            ghc-options: -Weverything -Wno-redundant-constraints
                         -Wno-missing-export-lists
        else
            ghc-options: -Weverything -Wno-redundant-constraints
    else
        
        if impl(ghc >=8.4)
            ghc-options: -Weverything -Wno-missing-export-lists
        else
            ghc-options: -Weverything