diff --git a/README.md b/README.md
index 67b4c96..9e0516c 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ In addition some of the scripts required for installation will destroy your data
 
 1. For Raspis it's the easiest if you prepare the SD card/disk on another system. For a PC you can just boot the installation ISO directly.
 2. For both devices you can format the disk/card with the following script `sudo ./scripts/format-disk.sh`. Make sure to edit it beforehand, to point it to the correct disk.
-3. Next install the system with `sudo nixos-install --no-root-passwd --root /mnt/nixos --impure --flake .#SYSTEMNAME`
+3. Next install the system with `sudo nixos-install --no-root-passwd --root /mnt/nixos --impure --flake .#SYSTEMNAME --no-channel-copy`
 4. Rename the partitions with the script `sudo ./scripts/rename-partitions.sh`. With this script as well. Check that you're pointing to the correct disk.
 
 When everything is finished you can reboot the system and remove the USB stick. You have now a fully encrypted NixOS system.