## Summary
Local self-hosted deploys (`trigger deploy --local-build --push
--builder orbstack` or any other buildx setup using the **docker**
driver) fail at the push step with:
```
ERROR: failed to build: failed to solve:
exporter option "rewrite-timestamp" conflicts with "unpack"
```
The docker driver auto-enables `unpack=true` when pushing, and that's
incompatible with `rewrite-timestamp` (which the CLI sets for
reproducible-build hashing).
Adds a simple env-var opt-out so contributors can keep using their
default builder. The flag is only read by the local-build code path;
remote/cloud builds are unaffected.
```bash
TRIGGER_BUILD_SKIP_REWRITE_TIMESTAMP=1 \
pnpm exec trigger deploy --profile default --local-build --push --builder orbstack
```
The trade-off: skipping `rewrite-timestamp` means layer timestamps
reflect actual build time, so two identical builds produce different
layer hashes. Fine for a local-dev registry; the only real consumer of
timestamp-stability is registry-layer cache hit rates.
## Test plan
- [x] Manual: ran `trigger deploy --profile default --local-build --push
--builder orbstack` against the localhost webapp + a local Docker
registry on port 5001 — first failed with the rewrite-timestamp/unpack
error, then succeeded after setting
`TRIGGER_BUILD_SKIP_REWRITE_TIMESTAMP=1`.
- [x] Full chat.agent smoke sweep (15 tests, including suspend/resume,
deepResearch subtask, AgentChat orchestrator) against the deployed image
— all pass.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Eric Allam
55fa2d4967