Description: I’m attempting to set up a Nix-shell environment for my project. I have created a default.nix file and a requirements.txt file with the following contents:
with import <nixpkgs> { };
let
pythonPackages = python3Packages;
in pkgs.mkShell rec {
name = "impurePythonEnv";
venvDir = "./.venv";
buildInputs = [
# A Python interpreter including the 'venv' module is required to bootstrap
# the environment.
pythonPackages.python
# This executes some shell code to initialize a venv in $venvDir before
# dropping into the shell
pythonPackages.venvShellHook
# Those are dependencies that we would like to use from nixpkgs, which will
# add them to PYTHONPATH and thus make them accessible from within the venv.
pythonPackages.numpy
pythonPackages.requests
# In this particular example, in order to compile any binary extensions they may
# require, the Python modules listed in the hypothetical requirements.txt need
# the following packages to be installed locally:
taglib
openssl
git
libxml2
libxslt
libzip
zlib
];
# Run this command, only after creating the virtual environment
postVenvCreation = ''
unset SOURCE_DATE_EPOCH
TMPDIR=/home/sukhman/tmp/ python3 -m pip install -r requirements.txt
'';
# Now we can execute any commands within the virtual environment.
# This is optional and can be left out to run pip manually.
postShellHook = ''
# allow pip to install wheels
unset SOURCE_DATE_EPOCH
'';
}