tell bit to use the code of a compiler

local-compiler

{
    "env": {
        "compiler": {
            "vue-cli-compiler": { // compiler name - can be anything. it's doesn't matter
                "options": {
                    "file": "/Users/itaymendel/dev/bit/bitenvs/dist/components/compilers/preact" // Path to the main dist file of the compiler... modify it to the path in your project
                }
            }
        }
    },
    "componentsDefaultDirectory": "components/{name}",
    "packageManager": "npm"
}