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repro-missing-cargo-env

Minimal reproduction for missing CARGO_PKG_LICENSE, CARGO_PKG_README, and PROFILE environment variables when building under Buck2 via buckal-bundles.

Steps

  1. Migrate to Buck2:

    cargo buckal migrate

  2. Build with Buck2:

    buck2 build //:repro-missing-cargo-env

  3. Observe the build script panic:

    Missing expected environment variable "CARGO_PKG_LICENSE"

Expected

The build should succeed. Cargo always sets CARGO_PKG_LICENSE, CARGO_PKG_README, and PROFILE for build scripts, even when empty.

Verify with Cargo

cargo build   # succeeds
cargo run     # prints: License: MIT, Readme: README.md, Profile: debug