README instructions don't work

[GuillaumeDesforges]

Describe the bug
Follow README instructions, it fails at init.

To Reproduce

$ nix flake init -t github:tweag/tf-ncl#hello-tf
$ nix run .#terraform -- hello-tf.ncl init
error: flake '...' does not provide attribute 'apps.x86_64-linux.terraform', 'packages.x86_64-linux.terraform', 'legacyPackages.x86_64-linux.terraform' or 'terraform'

Expected behavior
Should init.

[GuillaumeDesforges]

Then after

diff --git a/flake.nix b/flake.nix
index 7211af4..1084327 100644
--- a/flake.nix
+++ b/flake.nix
@@ -13,6 +13,7 @@
 
   outputs = inputs: inputs.utils.lib.eachDefaultSystem (system:
     {
+      packages.terraform = inputs.tf-ncl.packages.${system}.terraform;
       devShell = inputs.tf-ncl.lib.${system}.mkDevShell {
         providers = p: {
           inherit (p) null gcp;

I get

$ nix run .#terraform -- hello-tf.ncl init
Terraform has no command named "hello-tf.ncl".

To see all of Terraform's top-level commands, run:
  terraform -help

[vkleen]

Ah, I neglected to update the README in #43. The equivalent should be nix develop -c run-terraform init etc. If you enter the dev shell using nix develop it also prints a message to that effect.

I'll update the README 👍