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Using the Nix binary cache

If you don't use the binary cache, it might take hours to build stuff you could just download, already built by CI.

NixOS or nix-darwin or system-manager

Add this to your system configuration:

{
  nix.settings.extra-substituters = [
    "https://nix-postgres-artifacts.s3.amazonaws.com"
  ];
  nix.settings.extra-trusted-public-keys = [
    "nix-postgres-artifacts:dGZlQOvKcNEjvT7QEAJbcV6b6uk7VF/hWMjhYleiaLI="
  ];
}

Switch to the new configuration:

sudo nixos-rebuild switch
# or
sudo nix-darwin switch

Nix without NixOS or nix-darwin

If you don't have an immutable system configuration, you'll need to edit the nix config manually.

Edit this file:

/etc/nix/nix.conf

Extend it with this:

extra-substituters = https://nix-postgres-artifacts.s3.amazonaws.com
extra-trusted-public-keys = nix-postgres-artifacts:dGZlQOvKcNEjvT7QEAJbcV6b6uk7VF/hWMjhYleiaLI=

Caution

DO NOT add anyone to trusted-users in /etc/nix/nix.conf as it grants root without password. Instead, add the binary cache to extra-substituters and extra-trusted-public-keys.

Restart the nix daemon to load the new config:

On macOS:

sudo launchctl stop org.nixos.nix-daemon
sudo launchctl start org.nixos.nix-daemon

On Linux (systemd):

sudo systemctl restart nix-daemon