# Usage with `tectonic`
[`tectonic`](https://tectonic-typesetting.github.io/) is a modernized, alternative TeX engine.
Most features of `texlab` work out of the box when using `tectonic`.
To compile documents through `texlab`, you need to change the configuration.
See `tectonic --help` for more information about the flags.
---
**Hint:**
Please make sure to set `texlab.auxDirectory` if you change the build directory with the `--outdir` argument.
Also, `--keep-intermediates` is recommended because they allow `texlab`
to find out the section numbers and show them in the completion.
Without the `--keep-logs` flag, `texlab` won't be able to report compilation warnings.
---
## V2 CLI
```json
{
"texlab.build.executable": "tectonic",
"texlab.build.args": [
"-X",
"compile",
"%f",
"--synctex",
"--keep-logs",
"--keep-intermediates"
]
}
```
## V1 CLI
```json
{
"texlab.build.executable": "tectonic",
"texlab.build.args": [
"%f",
"--synctex",
"--keep-logs",
"--keep-intermediates"
]
}
```