elm-analyse must be installed globally.
Working directory is always current project root.
elm-analyse.json must be found there.
Alternatively, you can selectively run elm-analyse.
Build: Elm Analyse
I initially published linter-elm-analyse, though elm-analyse is rather costly operation and takes usually longer time than per-file linters/formatters. In such cases it would be better to manually run it on-demand, so build provider is the way to take.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.