Environment variables

A list of the environment variables available via Biome.

BIOME_LOG_PATH

The directory where the logs of the Biome Daemon are stored.

BIOME_LOG_PREFIX_NAME

A prefix that’s added to the name of the log. Default: server.log.

BIOME_LOG_LEVEL

The level of logging. Possible values: none, tracing, debug, info, warn, error. Default: info.

BIOME_LOG_KIND

What the log should look like. Possible values: pretty, compact, json. Default: pretty.

BIOME_CONFIG_PATH

A path to the configuration file

BIOME_THREADS

The number of threads to use in CI.

BIOME_WATCHER_KIND

The kind of watcher to use. Possible values: polling, recommended, none. Default: recommended.

BIOME_WATCHER_POLLING_INTERVAL

The polling interval in milliseconds. This is only applicable when using the polling watcher. Default: 2000.

BIOME_BINARY

Overrides the Biome binary being used. This allows you, for example, to use a system-wide Biome binary.

If you don’t define this variable, Biome will automatically detect the correct binary for your platform.

# Nix derivation example; the binary path comes from "${pkgs.biome}/bin/biome"
BIOME_BINARY=/nix/store/68fyfw1hidsqkal1839whi3nzgvqv4pa-biome-1.0.0/bin/biome npx @biomejs/biome format .

RUST_BACKTRACE

Enables capturing the backtrace when Biome panicked. This allows you to identify where the panic occurred.

RUST_BACKTRACE=1 npx @biomejs/biome check .