To repro this locally, run the following line from the root of a 'infra' checkout: ./recipes.py run --properties-file - zircon <<EOF { "$recipe_engine/path": { "cache_dir": "/b/s/w/ir/cache", "temp_dir": "/b/s/w/ir/tmp/rt" }, "$recipe_engine/runtime": { "is_experimental": false, "is_luci": true }, "gcs_bucket": "fuchsia-build", "target": "arm64", "repository": "https://fuchsia.googlesource.com/integration", "buildername": "zircon-arm64-clang-qemu", "run_tests": true, "use_kvm": false, "recipe": "zircon", "manifest": "zircon/zircon", "project": "integration", "buildbucket": { "hostname": "cr-buildbucket.appspot.com", "build": { "created_ts": 1544850620013909, "tags": [ "builder:zircon-arm64-clang-qemu", "buildset:commit/git/780a8862753a28a2cc98f3af82cf506bbeef98cc", "buildset:commit/gitiles/fuchsia.googlesource.com/integration/+/780a8862753a28a2cc98f3af82cf506bbeef98cc", "gitiles_ref:refs/heads/master", "scheduler_invocation_id:9092530494784390112", "scheduler_job_id:fuchsia/gi-zircon-arm64-clang-qemu", "user_agent:luci-scheduler" ], "bucket": "luci.fuchsia.global.ci", "created_by": "user:luci-scheduler@appspot.gserviceaccount.com", "project": "fuchsia", "id": "8927100432227336112" } }, "branch": "refs/heads/master", "path_config": "generic", "toolchain": "clang", "bot_id": "fuchsia-debian-16-c4acfc8a-us-central1-b-cbb6", "remote": "https://fuchsia.googlesource.com/integration", "revision": "780a8862753a28a2cc98f3af82cf506bbeef98cc" } EOF To run on Windows, you can put the JSON in a file and redirect the contents of the file into run_recipe.py, with the < operator.