SIMPLE start use nix and build placer

source start_nix.sh

# for package use 
#  nix-shell -p bash 

# for package use 
#  nix-shell -p home-manager

# or develop 
# cd build_placer
nix-shell build_env.nix

for CUDA
========
export LIBRARY_PATH=/usr/local/cuda-12.3/lib64:/usr/local/cuda-12.3/targets/x86_64-linux/lib/stubs
export CPATH=/usr/local/cuda-12.3/include

START NIXOS WSL

https://github.com/LGUG2Z/nixos-wsl-starter

after Nixos installed

sudo nix-channel --add https://nixos.org/channels/nixos-23.11 nixos

git clone https://github.com/LGUG2Z/nixos-wsl-starter.git /tmp/configuration
sudo nixos-rebuild switch --flake ~/nix/nixos_wsl

START NIX package manager

sh <(curl -L https://nixos.org/nix/install) --no-daemon

HOW develop works ?

except home-manager each folder represent a nix-shell (./default.nix) for it's develop enviroments)

for use develop on older package

sudo nix-channel --add https://nixos.org/channels/nixos-23.05 nixpkgs-23.05 sudo nix-channel --update

START : How to install home-manager

https://nix-community.github.io/home-manager/index.xhtml#ch-installation

Nixpkgs version 23.11 channel you can run

nix-channel --add https://github.com/nix-community/home-manager/archive/release-23.11.tar.gz home-manager nix-channel --update

Run the Home Manager installation command and create the first Home Manager generation:

nix-shell '' -A install

If you do not plan on having Home Manager manage your shell configuration then you must source the

#$HOME/.nix-profile/etc/profile.d/hm-session-vars.sh

in #$HOME/..profile

if [ -e $HOME/.nix-profile/etc/profile.d/hm-session-vars.sh ]; then . $HOME/.nix-profile/etc/profile.d/hm-session-vars.sh; fi # for nix home-manager

Develop local pkgs

git clone https://github.com/NixOS/nixpkgs.git

option 1

nix-shell -I nixpkgs=/path/to/your/nixpkgs --pure -p packageName

option 2

export NIX_PATH=nixpkgs=/path/to/your/nixpkgs:$NIX_PATH
nix-shell --pure -p packageName

option 3

or just direct modify the channel directory ls -al ~/.nix-defexpr/channels/

explore overlage

https://www.reddit.com/r/NixOS/comments/boj9qw/how_to_use_overlays_with_nixshell/

{ pkgs ? import <nixpkgs> { overlays = [ (import ./nix_files/overlay.nix) ]; } }:

build python

./configure --enable-shared LDFLAGS="-Wl,-rpath='$$ORIGIN/../lib'" \ --prefix=${HOME}/python312 --enable-optimizations