@electron-forge/maker-flatpak .flatpak files, which is a packaging format for Linux distributions that allows for sandboxed installation of applications in isolation from the rest of their system.
You can only build the Flatpak target if you have flatpak, flatpak-builder, and eu-strip (usually part of the elfutils package) installed on your system.
Configuration options are documented in MakerFlatpakOptionsConfig.
// forge.config.js
module.exports = {
makers: [
{
name: '@electron-forge/maker-flatpak',
config: {
options: {
categories: ['Video'],
mimeType: ['video/h264']
}
}
}
]
};