update agenix shell pinning as a workaround for agenix las version not being properly push to nixpkgs

mapping.nix

@@ -26,4 +26,14 @@
             ./shared/dns.nix
         ];
     };
+
+    mail = {
+        hosts = [
+            "mail-mtz-lasuite-federez"
+            "mail-ren-lasuite-federez"
+        ];
+        _inherit = [
+            ./shared/mail.nix
+        ];
+    };
 }

shared/mail.nix

@@ -0,0 +1,7 @@
+{ ... }:
+{
+    # Import dependencies
+    imports = [
+        ./mail/maddy.nix
+    ];
+}

shared/mail/maddy.nix

@@ -0,0 +1,21 @@
+{ config, lib, pkgs, ... }:
+
+let
+    # Import nodes
+    nodes = import ./../../nodes.nix;
+    myName = config.hostName;
+    myNode = nodes."${myName}";
+
+    # And mapping
+    mapping = import ./../../mapping.nix;
+
+in
+{
+    age.secrets = {
+        "tsig" = {
+            file = ./../../secrets/mail/tsig.age;
+            owner = "knot";
+            group = "knot";
+        };
+    };
+}

shell.nix

@@ -1,8 +1,9 @@
 { pkgs ? import <nixpkgs> {} }:
 
 let
+    agenixCommit = "531beac616433bac6f9e2a19feb8e99a22a66baf";
     agenixSrc = fetchTarball {
-        url = "https://github.com/ryantm/agenix/archive/main.tar.gz";
+        url = "https://github.com/ryantm/agenix/archive/${agenixCommit}.tar.gz";
         sha256 = "103slb8xy5sb68zxjjbb9d0svq8xz751a7yrg6vrz5rh4374bzgl";
     };
 in