treewide: cmake buildInputs to nativeBuildInputs, minor cleanups

pkgs/development/libraries/nss_wrapper/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, pkgconfig }:
+{ stdenv, fetchurl, cmake, pkg-config }:
 
 stdenv.mkDerivation rec {
   name = "nss_wrapper-1.1.11";
@@ -8,8 +8,7 @@ stdenv.mkDerivation rec {
     sha256 = "1q5l6w69yc71ly8gcbnkrcbnq6b64cbiiv99m0z5vn5lgwp36igv";
   };
 
-  nativeBuildInputs = [ pkgconfig ];
-  buildInputs = [ cmake ];
+  nativeBuildInputs = [ cmake pkg-config ];
 
   meta = with stdenv.lib; {
     description = "A wrapper for the user, group and hosts NSS API";