fb303: reorder attributes

(cherry picked from commit 025d0edf86)
(cherry picked from commit 96a214a588c953687086c21c4b8c72b2eae86f7c)

pkgs/by-name/fb/fb303/package.nix

@@ -25,9 +25,6 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   nativeBuildInputs = [ cmake ];
-  cmakeFlags = [
-    "-DPYTHON_EXTENSIONS=OFF"
-  ];
 
   buildInputs =
     [
@@ -43,6 +40,10 @@ stdenv.mkDerivation (finalAttrs: {
       (darwinMinVersionHook "11.0")
     ];
 
+  cmakeFlags = [
+    "-DPYTHON_EXTENSIONS=OFF"
+  ];
+
   meta = {
     description = "Base Thrift service and a common set of functionality for querying stats, options, and other information from a service";
     homepage = "https://github.com/facebook/fb303";