Environment Variables

Variable	Default	Effect
`NEXTBREW_ROOT`	platform default (see Configuration)	Data directory. Same as `--root`
`NEXTBREW_PREFIX`	derived from the root	Prefix directory. `--prefix` overrides it. On macOS the old default `<root>/prefix` is ignored
`NEXTBREW_AUTO_INIT`	unset	Initialize directories without prompting. Same as `--auto-init`
`NEXTBREW_API_URL`	Homebrew’s API	Use another formula API base URL
`NEXTBREW_API_AUTO_UPDATE_SECS`	`600`	Seconds the cached formula index is trusted before it is revalidated
`NEXTBREW_NO_AUTOREMOVE`	unset	If set to any value, `nb uninstall` does not run autoremove afterwards
`NEXTBREW_SERVICES_NO_DOMAIN_WARNING`	unset	If set, hides the launchd domain warning from `nb services`
`NEXTBREW_DIR`	`~/.nextbrew`	Used by `nb init` to build the shell config block, and by the installer as its source checkout directory
`NEXTBREW_BIN`	`~/.local/bin` (installer)	Directory the installer puts `nb` and `nbx` in. `nb init` writes it into your shell config and puts it on `PATH` (falling back to `$NEXTBREW_DIR/bin` when unset)

nb bundle also reads HOMEBREW_BUNDLE_FILE, HOMEBREW_BUNDLE_FILE_GLOBAL and HOMEBREW_BUNDLE_NO_UPGRADE.

The installer (install.sh) honours NEXTBREW_DIR, NEXTBREW_BIN, NEXTBREW_ROOT and NEXTBREW_PREFIX. Other NEXTBREW_* names (NEXTBREW_FORMULA_*, NEXTBREW_CELLAR, NEXTBREW_LOGS and the like) are set by nextbrew for source builds; do not set them yourself.