Reinstalling Nix + nix-darwin + home-manager on macOS

install.zsh

# https://github.com/NixOS/nix/issues/3261
# sudo ln -sf /nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt /etc/ssl/certs/ca-certificates.crt

# https://discourse.nixos.org/t/nix-flake-and-fetcher-cache-v1-sqlite/8958
# (local u="$(whoami); sudo chown "$u:users" ~/.cache/nix)

# https://github.com/numtide/nix-unstable-installer
sh <(curl -L https://github.com/numtide/nix-unstable-installer/releases/download/nix-2.5pre20211026_5667822/install) --daemon

nix-channel --add https://nixos.org/channels/nixpkgs-unstable nixpkgs
# https://nix-community.github.io/home-manager/index.html#sec-install-nix-darwin-module
nix-channel --add https://github.com/nix-community/home-manager/archive/master.tar.gz home-manager
nix-channel --update

# https://github.com/LnL7/nix-darwin
nix-build https://github.com/LnL7/nix-darwin/archive/master.tar.gz -A installer
./result/bin/darwin-installer
rm -r result

uninstall.zsh

# Credits to
# https://github.com/NixOS/nix/issues/1402
# https://github.com/NixOS/nix/issues/3900

sudo launchctl bootout system /Library/LaunchDaemons/org.nixos.darwin-store.plist
sudo launchctl bootout system /Library/LaunchDaemons/org.nixos.nix-daemon.plist
sudo rm /Library/LaunchDaemons/org.nixos*

cp -r .nixpkgs .nixpkgs-bak
rm -r ~/.nix-{channels,defexpr,profile}

# If custom PAM modules for sudo were installed via Nix:
# https://support.apple.com/en-us/HT204012
# open -a 'Directory Utility'
# Click the lock to make changes -> Edit -> Root User…
# su
# vim /etc/pam.d/sudo # delete nix module lines

for i in {1..32}; sudo dscl . -delete "/Users/_nixbld$i"
sudo dscl . -delete /groups/nixbld

sudo mv /etc/bash.bashrc.backup-before-nix /etc/bash.bashrc
sudo mv /etc/bashrc.backup-before-nix /etc/bashrc
sudo mv /etc/zshrc.backup-before-nix /etc/zshrc
sudo rm /etc/ssl/certs/ca-certificates.crt
sudo rm -r /etc/nix

sudo vifs # delete nix line

sudo vim /etc/synthetic.conf # delete nix line

# diskutil apfs deleteVolume disk1s7
open -a 'Disk Utility' # delete Nix Store volume
# if that doesn't work force eject via Finder first
# open /nix