[1 of 3] Compiling T14365B[boot]    ( T14365B.hs-boot, T14365B.o-boot )

T14365B.hs-boot:5:13: error:
    • Can't make a derived instance of ‘Functor Foo’:
        Cannot derive instances in hs-boot files
        Write an instance declaration instead
    • In the data declaration for ‘Foo’

T14365B.hs-boot:7:1: error:
    • Can't make a derived instance of ‘Foldable Foo’:
        Cannot derive instances in hs-boot files
        Write an instance declaration instead
    • In the stand-alone deriving instance for ‘Foldable Foo’