## 14.2 Environment variables

Some maintenance scripts and instructions in this guide rely on the following environment variables. They should be predefined in LilyDev distribution (see LilyDev); if you set up your own development environment, you can set them by appending these settings to your ‘~/.bashrc’ (or whatever defines your default environment variables for the user account for LilyPond development), then logging out and in (adapt directories to your setup):

```LILYPOND_GIT=~/lilypond-git
export LILYPOND_GIT
LILYPOND_BUILD_DIR=~/lilypond-git/build
export LILYPOND_BUILD_DIR
```

The standard build and install procedure (with `autogen.sh`, `configure`, `make`, `make install`, `make doc` …) does not rely on them.

In addition, for working on the website, `LILYPOND_WEB_MEDIA_GIT` should be set to the repository lilypond-extra, see lilypond-extra.