sb.sh

readonly NIX_BUILD_GROUP_ID=30000
readonly NIX_BUILD_GROUP_NAME=nixbld
readonly NIX_FIRST_BUILD_UID=30001
readonly NIX_USER_COUNT=48

sudo groupadd \
  -g "$NIX_BUILD_GROUP_ID" \
  --system \
  "$NIX_BUILD_GROUP_NAME"

for i in $(seq 1 "$NIX_USER_COUNT"); do
  sudo useradd \
    --home-dir /var/empty \
    --comment "Nix build user $i" \
    --gid "$NIX_BUILD_GROUP_ID" \
    --groups "$NIX_BUILD_GROUP_NAME" \
    --no-user-group \
    --system \
    --shell /sbin/nologin \
    --uid $((NIX_FIRST_BUILD_UID + i - 1)) \
    --password "!" \
    "$NIX_BUILD_GROUP_NAME$i"
done

echo "build-users-group = $NIX_BUILD_GROUP_NAME" > ~/.config/nix/nix.conf