feat: update flake.lock; update sops-nix to use ssh key

modules/sops.nix

@@ -14,25 +14,21 @@ in
       type = lib.types.bool;
       default = true;
     };
-    sshKeyPath = lib.mkOption {
+    sshKeyFile = lib.mkOption {
       type = lib.types.str;
       default = "${config.my.persist.location}/home/${username}/.ssh/id_ed25519";
     };
   };
 
   config = lib.mkIf cfg.enable {
-    sops.age.sshKeyPaths = [
-      cfg.sshKeyPath
-    ];
+    sops.age.sshKeyFile = cfg.sshKeyFile;
     users.users.${username}.extraGroups = [ "keys" ];
-    environment.variables.SOPS_AGE_KEY_FILE = "/run/secrets.d/age-keys.txt";
     my.home = {
-      sops.age.sshKeyPaths = [
-        cfg.sshKeyPath
-      ];
+      sops.age.sshKeyFile = cfg.sshKeyFile;
       home.packages = [
         pkgs.sops
       ];
+      home.sessionVariables.SOPS_AGE_SSH_PRIVATE_KEY_FILE = cfg.sshKeyFile;
     };
   };
 }