clan-cli/secrets: suggest clan vars keygen instead

Found that while reading through some code.

devFlake/flake.lock

@@ -3,10 +3,10 @@
     "clan-core-for-checks": {
       "flake": false,
       "locked": {
-        "lastModified": 1759727242,
-        "narHash": "sha256-15Q9eXbfsLmzIbYWasZ3Nuqafnc5o9al9RmGuBGVK74=",
+        "lastModified": 1759795610,
+        "narHash": "sha256-YFOK+aoJjWLfMHj2spvrQIe0ufIsv6P8o44NqoFPwp0=",
         "ref": "main",
-        "rev": "c737271585ff3df308feab22c09967fce8f278d3",
+        "rev": "0de79962eacfe6f09d7aabca2a7305deef4fde0c",
         "shallow": true,
         "type": "git",
         "url": "https://git.clan.lol/clan/clan-core"
@@ -105,11 +105,11 @@
     },
     "nixpkgs-dev": {
       "locked": {
-        "lastModified": 1759670943,
-        "narHash": "sha256-JBjTDfwzAwtd8+5X/Weg27WE/3hVYOP3uggP2JPaQVQ=",
+        "lastModified": 1759794031,
+        "narHash": "sha256-Zruni/00BlDHSWVJf3mb0o+OHnxIvJNuXkPloY9c+PU=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "21980a9c20f34648121f60bda15f419fa568db21",
+        "rev": "09c221b2f0726da85b124efb60a1d123971dfa08",
         "type": "github"
       },
       "original": {

docs/site/guides/nixpkgs-flake-input/index.md

@@ -5,11 +5,11 @@
 ## Option 1: Follow `clan-core`
 
 - **Pros**:
-  - Recommended for most users.
-  - Verified by our CI and widely used by others.
+    - Recommended for most users.
+    - Verified by our CI and widely used by others.
 - **Cons**:
-  - Coupled to version bumps in `clan-core`.
-  - Upstream features and packages may take longer to land.
+    - Coupled to version bumps in `clan-core`.
+    - Upstream features and packages may take longer to land.
 
 Example:
 
@@ -24,10 +24,10 @@ inputs = {
 ## Option 2: Use Your Own `nixpkgs` Version
 
 - **Pros**:
-  - Faster access to new upstream features and packages.
+    - Faster access to new upstream features and packages.
 - **Cons**:
-  - Recommended for advanced users.
-  - Not covered by our CI — you’re on the frontier.
+    - Recommended for advanced users.
+    - Not covered by our CI — you’re on the frontier.
 
 Example:
 

pkgs/clan-cli/clan_cli/secrets/secrets.py

@@ -158,8 +158,10 @@ def encrypt_secret(
     admin_keys = sops.ensure_admin_public_keys(flake_dir)
 
     if not admin_keys:
-        # TODO double check the correct command to run
-        msg = "No keys found. Please run 'clan secrets add-key' to add a key."
+        msg = (
+            "No admin keys found.\n\n"
+            "Please run 'clan vars keygen' to generate and set up keys."
+        )
         raise ClanError(msg)
 
     username = next(iter(admin_keys)).username