Using nix

TODO: nix is …​

Setup

MacOS Example

The following works as of nix version 2.7.0. The nix ecosystem is evolving rapidly, so

  1. Install the nix package manager.

  2. Configure nix by modifying and adding the following files

    /etc/nix/nix.conf
    build-users-group = nixbld
experimental-features = nix-command flakes
trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ= cache.dhall-lang.org:I9/H18WHd60olG5GsIjolp7CtepSgJmM2CsO813VTmM= dhall.cachix.org-1:8laGciue2JBwD49ICFtg+cIF8ddDaW7OFBjDb/dHEAo= nsstatdev-main-usae1-nix-cache-1:3qt3qqlXhyl2HGK8UE1Eh12NEmoyK8mx81uDWDAKPn4=
substituters = https://cache.nixos.org/ https://hydra.iohk.io https://cache.dhall-lang.org https://dhall.cachix.org s3://nsstatdev-main-usae1-nix-cache
post-build-hook = /etc/nix/upload-to-cache.sh
    /etc/nix/key.private

    Ask for the key on slack

    /etc/nix/upload-to-cache.sh
    #!/bin/sh

set -eu
set -f # disable globbing
export IFS=' '

echo "Signing paths" $OUT_PATHS
nix store sign --key-file /etc/nix/key.private $OUT_PATHS
echo "Uploading paths" $OUT_PATHS
exec nix copy --to 's3://nsstatdev-main-usae1-nix-cache' $OUT_PATHS

    Set this script to executable:

    chmod +x /etc/nix/upload-to-cache.sh

  3. Test out nix: nix build nixpkgs#hello