Use dot operator for attribute sets with 1 element

modules/datasync.nix

@@ -31,7 +31,7 @@
           devices = [ "zion" ];
           versioning = {
             type = "simple";
-            params = { keep = "5"; };
+            params.keep = "5";
           };
         };
 
@@ -41,7 +41,7 @@
           devices = [ "zion" ];
           versioning = {
             type = "simple";
-            params = { keep = "5"; };
+            params.keep = "5";
           };
         };
 

modules/printing.nix

@@ -12,12 +12,10 @@
     enable = true;
     brscan4 = {
       enable = true;
-      netDevices = {
-        home = {
+      netDevices.home = {
         model = "DCP-L2530DW";
         ip = "192.168.13.4";
       };
     };
   };
-  };
 }