Output Location Seems Inconsistent

[baxterjo]

I'm new to this tool so this may have been answered before, but it seems like the output for the coverage report is nesting when it should overwrite. If I start from a point of no target/ directory an run these commands:

        RUST_LOG=DEBUG CARGO_INCREMENTAL=0 RUSTFLAGS='-Cinstrument-coverage' LLVM_PROFILE_FILE='./target/coverage_temp/cargo-test-%p-%m.profraw' cargo test

    grcov ./target/coverage_temp \
    --binary-path ./target/debug/deps/ \
    -s . \
    -t html \
    --branch \
    --keep-only "*${app_name}*" \
    --ignore "*target/debug/build*" \
    -o ./target/coverage/html/

The first time it generates the html directory in the expected location:

./target/coverage/
└── html
    ├── badges
    └── src
        └── files

Then when I run the exact two commands for a second time when the html dir already exists:

./target/coverage/
└── html
    ├── badges
    ├── html
    │   ├── badges
    │   └── src
    │       └── files
    └── src
        └── files

Is this expected?