diff --git a/terraform/all-in-one.md b/terraform/all-in-one.md
index 2ed356f..07edc2c 100644
--- a/terraform/all-in-one.md
+++ b/terraform/all-in-one.md
@@ -117,7 +117,7 @@ No resources.
| [install\_user](#input_install_user) | SSH user used to connect to the target\_host, before installing NixOS. If null than the value of `target_host` is used | `string` | `null` | no |
| [instance\_id](#input_instance_id) | The instance id of the target\_host, used to track when to reinstall the machine | `string` | `null` | no |
| [kexec\_tarball\_url](#input_kexec_tarball_url) | NixOS kexec installer tarball url | `string` | `null` | no |
-| [nix\_options](#input_nix_options) | the options of nix | `map(string)` | `null` | no |
+| [nix\_options](#input_nix_options) | the options of nix | `map(string)` | `{}` | no |
| [nixos\_partitioner\_attr](#input_nixos_partitioner_attr) | Nixos partitioner and mount script i.e. your-flake#nixosConfigurations.your-evaluated-nixos.config.system.build.diskoNoDeps or just your-evaluated.config.system.build.diskNoDeps. `config.system.build.diskNoDeps` is provided by the disko nixos module | `string` | n/a | yes |
| [nixos\_system\_attr](#input_nixos_system_attr) | The nixos system to deploy i.e. your-flake#nixosConfigurations.your-evaluated-nixos.config.system.build.toplevel or just your-evaluated-nixos.config.system.build.toplevel if you are not using flakes | `string` | n/a | yes |
| [no\_reboot](#input_no_reboot) | Do not reboot after installation | `bool` | `false` | no |
diff --git a/terraform/all-in-one/variables.tf b/terraform/all-in-one/variables.tf
index d9575c4..06b20b2 100644
--- a/terraform/all-in-one/variables.tf
+++ b/terraform/all-in-one/variables.tf
@@ -105,5 +105,5 @@ variable "no_reboot" {
variable "nix_options" {
type = map(string)
description = "the options of nix"
- default = null
+ default = {}
}
diff --git a/terraform/nix-build.md b/terraform/nix-build.md
index 68eb23c..f64098a 100644
--- a/terraform/nix-build.md
+++ b/terraform/nix-build.md
@@ -35,7 +35,7 @@ No modules.
| ------------------------------------------------------------------- | -------------------------------------------------- | ------------- | ------- | :------: |
| [attribute](#input_attribute) | the attribute to build, can also be a flake | `string` | n/a | yes |
| [file](#input_file) | the nix file to evaluate, if not run in flake mode | `string` | `null` | no |
-| [nix\_options](#input_nix_options) | the options of nix | `map(string)` | `null` | no |
+| [nix\_options](#input_nix_options) | the options of nix | `map(string)` | `{}` | no |
## Outputs
diff --git a/terraform/nix-build/nix-build.sh b/terraform/nix-build/nix-build.sh
index 2884d5c..8e5babc 100755
--- a/terraform/nix-build/nix-build.sh
+++ b/terraform/nix-build/nix-build.sh
@@ -4,7 +4,7 @@ set -efu
declare file attribute nix_options
eval "$(jq -r '@sh "attribute=\(.attribute) file=\(.file) nix_options=\(.nix_options)"')"
options=$(echo "${nix_options}" | jq -r '.options | to_entries | map("--option \(.key) \(.value)") | join(" ")')
-if [[ -n ${file-} ]] && [[ -e ${fileh-} ]]; then
+if [[ -n ${file-} ]] && [[ -e ${file-} ]]; then
# shellcheck disable=SC2086
out=$(nix build --no-link --json $options -f "$file" "$attribute")
printf '%s' "$out" | jq -c '.[].outputs'