Error: Unable to find a set of packages that will work with your constraints.

[gyzerok]

Subj

[jvoigtlaender]

More information about what you were trying to do will be needed to do anything here. For example, how does your elm-package.json file look? What command(s) did you issue? Starting in an empty directory?

[gyzerok]

@jvoigtlaender Sorry for the lack of info.

{
    "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": [
        "./src"
    ],
    "exposed-modules": [],
    "dependencies": {
        "elm-lang/core": "3.0.0 <= v < 4.0.0",
        "evancz/elm-html": "4.0.2 <= v < 5.0.0"
    },
    "elm-version": "0.15.1 <= v < 0.16.0"
}

I'm running in this issue while executing elm-package install evancz/elm-http

[jvoigtlaender]

Okay. As seen here, version 3.0.0 of core depends on at least version 0.16.0 of Elm. So elm-lang/core": "3.0.0 <= v < 4.0.0" is incompatible with "elm-version": "0.15.1 <= v < 0.16.0". You have to change one of these constraints.

Of course, it would be nice if the error message had told you so. There is some issue already open either here or in the elm-make repo which is tracking this. So at some point there will hopefully be a more informative error in such cases.

Does this resolve the present issue?

[gyzerok]

@jvoigtlaender Yes, big thanks!