My nix dev stuff

The dev shells and templates which I'm using across different projects. Gathered here instead of writing the same flake/shell in multiple projects.

To list available shells & templates run:

nix flake show github:onjin/nix-dev

Flake Shells

To use the shells from remote run:

nix develop "github:onjin/nix-dev#python-312-venv"

Python flakes' environment variables:

To pass variables into flake you need to use --impure flag.

• NIX_DEV_PYTHON_VENVDIR=~/.local/share/myenv - overwrite ./.venv default for ...-env python flakes
• NIX_DEV_PYTHON_REQUIREMENTS_TXT=requirements.txt - run pip install -r ... for file name set as variable
• NIX_DEV_PYTHON_REQUIREMENTS="uv anyio" - run pip install ... for list of packages

Or clone repository and use from path:

git clone https://github.com/onjin/nix-dev
cd nix-dev
nix develop .#python-312-venv

Integrate with https://direnv.net/:

$ cat .envrc 
export NIX_DEV_PYTHON_VENVDIR=~/.local/share/myenv
export NIX_DEV_PYTHON_REQUIREMENTS_TXT=requirements.txt
export NIX_DEV_PYTHON_REQUIREMENTS="uv anyio"
use flake github:onjin/nix-dev#python-313-venv --impure

You can combine multiple environment, i.e. python + nodejs adding two use flake ... lines or running nix flake ... twice. Or more :)

Flake Templates

To initialize your project using template run:

nix flake new -t "github:onjin/nix-dev#python-shell" my-python-project

python:

• python-shell