anchor.diff:  
     websockets = overrideCabal super.websockets (drv: {
       ## Upstreamed, awaiting a Hackage release
  -    ## 
  +    ##
       ##     • No instance for (Semigroup SizeLimit)
       ##         arising from the superclasses of an instance declaration
       ##     • In the instance declaration for ‘Monoid SizeLimit’
  
positive.code: 
    reflex = overrideCabal super.reflex (drv: {
      ## Unmerged.  PR: https://github.com/reflex-frp/reflex/pull/158
      ## 
      ##     • Could not deduce (Semigroup (Event t a))
      ##         arising from the superclasses of an instance declaration
      ##       from the context: (Semigroup a, Reflex t)
  
negative.code: 
    blaze-builder = overrideCabal super.blaze-builder (drv: {
      ## Unmerged.  PR: https://github.com/lpsmith/blaze-builder/pull/10
      ##
      ##     • No instance for (Semigroup Poke)
      ##         arising from the superclasses of an instance declaration
      ##     • In the instance declaration for ‘Monoid Poke’
  