diff --git a/modules/installer/tools/installer2/nixos-bootstrap.sh b/modules/installer/tools/installer2/nixos-bootstrap.sh
index ad9baad4dd7..9c972bd6d95 100644
--- a/modules/installer/tools/installer2/nixos-bootstrap.sh
+++ b/modules/installer/tools/installer2/nixos-bootstrap.sh
@@ -118,7 +118,6 @@ INFO "building the system configuration..."
 @nix@/bin/nix-env \
     -p /nix/var/nix/profiles/system \
     -f "$NIXOS" \
-    --arg configuration "import $NIXOS_CONFIG" \
     --set -A system \
     $NIX_ENV_ARGS
 
diff --git a/modules/installer/tools/nixos-install.sh b/modules/installer/tools/nixos-install.sh
index 5ae1a89b52f..43d84aba032 100644
--- a/modules/installer/tools/nixos-install.sh
+++ b/modules/installer/tools/nixos-install.sh
@@ -152,7 +152,6 @@ echo "building the system configuration..."
 NIXPKGS=/mnt/etc/nixos/nixpkgs chroot $mountPoint @nix@/bin/nix-env \
     -p /nix/var/nix/profiles/system \
     -f "/mnt$NIXOS" \
-    --arg configuration "import $NIXOS_CONFIG" \
     --set -A system