diff --git a/nixos-infect b/nixos-infect
index 2a26b73..f23665e 100755
--- a/nixos-infect
+++ b/nixos-infect
@@ -263,7 +263,8 @@ installNix() {
   fi
 
   echo "Running nix installer..."
-  if $SHELL "${tmpNixInstall}" --daemon; then
+  if $SHELL "${tmpNixInstall}" \
+    --daemon --no-channel-add --daemon-user-count 4; then
       echo "Nix is installed"
       rm "${tmpNixInstall}"
   else
@@ -295,6 +296,9 @@ infect() {
   # is it needed?
   # source ~/.nix-profile/etc/profile.d/nix.sh
 
+  cd ${LOCAL_FLAKE_DIR}
+  /root/.nix-profile/bin/nix flake lock --update-input sp-modules
+
   echo "nix build the configuration flake..."
   if ! /root/.nix-profile/bin/nix build \
   --extra-experimental-features "nix-command flakes" \