Environment Variables

Codegen sandboxes come pre-configured with a set of environment variables to facilitate common development tasks and ensure smooth operation of tools and package managers. Understanding these variables can be helpful when debugging or customizing setup scripts.

Standard Environment Variables

The following environment variables are typically available within Codegen sandboxes:

Variable	Default Value	Description
NVM_DIR	Dynamic	Specifies the directory where Node Version Manager (NVM) is installed. The exact path is set during sandbox initialization.
PATH	Dynamic (includes NVM Node version)	The system’s execution search path. It’s augmented to include the bin directory of the currently active Node.js version (managed by NVM).
NVM_BIN	Dynamic (points to active Node version bin)	Points to the bin directory of the currently active Node.js version. This is also set dynamically by NVM.
NODE_VERSION	Dynamic (current NVM Node version)	Indicates the version of Node.js that is currently active in the sandbox, as managed by NVM.
NODE_OPTIONS	"--max-old-space-size=8192"	Configures V8 to allow a max old space size of 8192MB. Useful for memory-intensive Node.js apps.
DEBIAN_FRONTEND	"noninteractive"	Instructs Debian-based package managers (like apt) to run without interactive prompts.
PYTHONUNBUFFERED	"1"	Forces stdout and stderr for Python to be unbuffered, meaning output is written immediately.
COREPACK_ENABLE_DOWNLOAD_PROMPT	"0"	Disables the Corepack prompt when it needs to download a package manager (like Yarn or pnpm).
PYTHONPATH	"/usr/local/lib/python3.13/site-packages"	Adds the specified directory to Python’s module search path. (Python version may vary).
IS_SANDBOX	"true"	A boolean flag indicating the environment is a Codegen sandbox.
NPM_CONFIG_YES	"true"	Configures npm to automatically answer “yes” to prompts.
PIP_NO_INPUT	"1"	Instructs pip (Python’s package installer) to operate in non-interactive mode.
YARN_ENABLE_IMMUTABLE_INSTALLS	"false"	Disables Yarn’s “immutable installs” feature, allowing yarn install to modify the lockfile.

The values for variables like NVM_DIR, PATH, NVM_BIN, and NODE_VERSION are typically set dynamically during the sandbox setup process, depending on the specific NVM and Node.js versions being used. The PYTHONPATH may also vary based on the Python installation within the sandbox.