fix: flakes support on disko standalone cli

cli.nix

@@ -17,11 +17,14 @@ let
 
   hasDiskoFile = diskoFile != null;
 
+  hasDiskoConfigFlake =
+    hasDiskoFile || lib.hasAttrByPath [ "diskoConfigurations" flakeAttr ] (builtins.getFlake flake);
+
   diskoAttr =
     (
       if noDeps then
         (
-          if hasDiskoFile then
+          if hasDiskoFile || hasDiskoConfigFlake then
             {
               destroy = "_cliDestroyNoDeps";
               format = "_cliFormatNoDeps";
@@ -50,7 +53,7 @@ let
         }
       else
         (
-          if hasDiskoFile then
+          if hasDiskoFile || hasDiskoConfigFlake then
             {
               destroy = "_cliDestroy";
               format = "_cliFormat";
@@ -79,9 +82,6 @@ let
         }
     ).${mode};
 
-  hasDiskoConfigFlake =
-    hasDiskoFile || lib.hasAttrByPath [ "diskoConfigurations" flakeAttr ] (builtins.getFlake flake);
-
   hasDiskoModuleFlake = lib.hasAttrByPath [
     "nixosConfigurations"
     flakeAttr