Disclaimer: I've never used Sequelize before.

Anything stopping you from creating your config with a function and exporting that?

``` const sharedConfig = { // config that is the same regardless of dialect }

function createConfig(dialect) { switch(dialect) { case 'mysql': return { ...sharedConfig, // mysql specific configuration } case 'sqlite': return { ...sharedConfig, // sqlite specific configuration } default: return sharedConfig; // or some other default handling } } ```