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/swarming": { "server": "https://chromium-swarm.appspot.com" }, "gcs_bucket": "fuchsia-build", "target": "arm64", "repository": "https://fuchsia.googlesource.com/integration", "buildername": "zircon-arm64-gcc-no_user_linker_gc-build_only", "run_tests": false, "make_args": [ "USER_USE_LINKER_GC=false" ], "recipe": "zircon", "manifest": "zircon/zircon", "project": "integration", "buildbucket": { "hostname": "cr-buildbucket.appspot.com", "build": { "created_ts": 1547257793680248, "tags": [ "builder:zircon-arm64-gcc-no_user_linker_gc-build_only", "buildset:commit/git/6849f6c337b602827bd1c46fb7e9d2ba05b64a9d", "buildset:commit/gitiles/fuchsia.googlesource.com/integration/+/6849f6c337b602827bd1c46fb7e9d2ba05b64a9d", "gitiles_ref:refs/heads/master", "scheduler_invocation_id:9090006389962469376", "scheduler_job_id:fuchsia/gi-zircon-arm64-gcc-no_user_linker_gc-build_only", "user_agent:luci-scheduler" ], "bucket": "luci.fuchsia.global.ci", "created_by": "user:luci-scheduler@appspot.gserviceaccount.com", "project": "fuchsia", "id": "8924576327692284592" } }, "$recipe_engine/runtime": { "is_experimental": false, "is_luci": true }, "branch": "refs/heads/master", "path_config": "generic", "toolchain": "gcc", "bot_id": "fuchsia-debian-16-c4acfc8a-us-central1-b-w4zz", "$recipe_engine/isolated": { "server": "https://isolateserver.appspot.com" }, "remote": "https://fuchsia.googlesource.com/integration", "revision": "6849f6c337b602827bd1c46fb7e9d2ba05b64a9d" } 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.