treewide: switch to nativeCheckInputs

checkInputs used to be added to nativeBuildInputs. Now we have
nativeCheckInputs to do that instead. Doing this treewide change allows
to keep hashes identical to before the introduction of
nativeCheckInputs.

pkgs/development/python-modules/atomicwrites/default.nix

@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   # Tests depend on pytest but atomicwrites is a dependency of pytest
   doCheck = false;
-  checkInputs = [ pytest ];
+  nativeCheckInputs = [ pytest ];
 
   meta = with lib; {
     description = "Atomic file writes on POSIX";