fly launch for Shopify apps fails: `shopify app deploy --force` — --force removed in Shopify CLI 4.x

[NeuroticCoder91]

fly launch aborts when scaffolding a Shopify app. flyShopifyConfig in fly.js runs:

execSync(`shopify app deploy --force --config ${configFile}`, { stdio: 'inherit' })

but the --force flag was removed from shopify app deploy in current Shopify CLI (reproduced on 4.2.0). The valid flags are now: reset, allow-updates, allow-deletes, no-release, no-build, message, version, source-control-url, config, client-id, path. So the command exits with:

✗ Nonexistent flag: --force
...
Error: failed to generate Dockerfile: exit status 1
    at GDF.flyShopifyConfig (.../@flydotio/dockerfile/fly.js:395:7)

Because it throws inside Dockerfile generation, the entire fly launch fails — no fly.toml is produced.

Versions: @flydotio/dockerfile@0.7.10, @shopify/cli@4.2.0, Node 24.

Fix: drop --force (the flag is gone, and --config is still valid):

execSync(`shopify app deploy --config ${configFile}`, { stdio: 'inherit' })

[aidantjones]

Had the same issue, and the fix worked for me as well.