Run a command in a Nix-aware PRoot environment.

nx.sh

#!/bin/bash

# Run the given command in a Nix-aware environment installed in
# '~/opt/nix', assuming PRoot is available in '~/opt/bin/proot-x86_64'.
#
# If no arguments are given, 'zsh' is executed.
#
# Note:
# The full path to 'nix.sh' is given instead of '~/.nix-profile/etc/profile.d/nix.sh',
# because in some cases, the symlink may not be property set up when running the script.

set -- ${1:-zsh} ${@:2:$#}

$HOME/opt/bin/proot-x86_64 -b $HOME/opt/nix:/nix sh <(echo "source /nix/var/nix/profiles/per-user/$USER/profile/etc/profile.d/nix.sh && $@")