do not keep root/.nix-defexpr/channels after reboot

nixos-infect

@@ -277,19 +277,7 @@ installNix() {
 }
 
 infect() {
-  # Add nix build users
-  # FIXME run only if necessary, rather than defaulting true
-  # groupadd nixbld -g 30000 || true
-  # for i in {1..10}; do
-  #   useradd -c "Nix build user $i" -d /var/empty -g nixbld -G nixbld -M -N -r -s "$(which nologin)" "nixbld$i" || true
-  # done
-  # TODO use addgroup and adduser as fallbacks
-  #addgroup nixbld -g 30000 || true
-  #for i in {1..10}; do adduser -DH -G nixbld nixbld$i || true; done
-
-  # install Nix in the current system
-  # (this should create system nixbld users too)
-  # curl -L "https://releases.nixos.org/nix/nix-$NIX_VERSION/install" | $SHELL
+  # install multiuser (system-wide with nix-daemon) Nix in the current system
   if ! installNix; then
       echo "Nix installation failed!"
       exit 1
@@ -328,7 +316,6 @@ infect() {
   touch /etc/NIXOS
   echo etc/nixos        > /etc/NIXOS_LUSTRATE
   echo etc/resolv.conf >> /etc/NIXOS_LUSTRATE
-  echo root/.nix-defexpr/channels >> /etc/NIXOS_LUSTRATE
 
   rm -rf /boot.bak
   ((isEFI)) && umount "$ESP"