> Error: Unable to find a set of packages that will work with your 
constraints.
> 
> I'm sure it's just my lack of experience managing elm packages which is 
to blame.
> Can you suggest the best way to upgrade?

You should be using the " 7.0.0 <= v < 8.0.0" constraint and you should 
also set your elm version constraint to `"elm-version": "0.17.1 <= v < 
0.18.0"` because it requires at least elm 0.17.1, which I am betting you do 
not have based on your error message.

On Friday, August 5, 2016 at 1:53:00 PM UTC-6, Rex van der Spuy wrote:
>
> This is brilliant, thanks so much!
> I use elm-mdl everyday, for everything :)
>
> I have one question about upgrading.
> I ran `elm package install debois/elm-mdl` and received this message:
>
> Error: This is a tricky update, you should modify elm-package.json 
> yourself.
> Package debois/elm-mdl is already listed as a dependency:
>    "debois/elm-mdl": "6.0.3 <= v < 7.0.0"
> You probably want one of the following constraints instead:
>    6.0.3 <= v < 7.0.0
>    7.0.0 <= v < 8.0.0
>
> So, I did what it suggested and modified `elm-package.json` to match that.
> When I ran `elm package install` again I received:
>
> Error: Unable to find a set of packages that will work with your 
> constraints.
>
> I'm sure it's just my lack of experience managing elm packages which is to 
> blame.
> Can you suggest the best way to upgrade?
>

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