Can you run just the command "elm-package" to verify what version is being
called? Did you write that JSON yourself, or did elm-package generate it?

You need to change the core dependency to "elm-lang/core": "4.0.1 <= v <
5.0.0". But I'm not sure why it would add the old version of core to the
initial JSON.

On Wed, Jun 1, 2016 at 1:30 PM, William Bailey <[email protected]> wrote:

> Last night I upgraded my MAC laptop to elm 0.17.  No problems.
>
> Today I'm doing the same on my iMAC.  Install of binaries succeeded.  But
> then in an empty directory:
>
> % elm package install
> Error: unable to find a set of packages that will work with your
> constraints
>
> It did create an elm-package.json which appears ok.  Any ideas?
>
> cat elm-package.json
>
> {
>
>     "version": "1.0.0",
>
>     "summary": "helpful summary of your project, less than 80 characters",
>
>     "repository": "https://github.com/user/project.git";,
>
>     "license": "BSD3",
>
>     "source-directories": [
>
>         "."
>
>     ],
>
>     "exposed-modules": [],
>
>     "dependencies": {
>
>         "elm-lang/core": "3.0.0 <= v < 4.0.0"
>
>     },
>
>     "elm-version": "0.17.0 <= v < 0.18.0"
>
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