r-modules: use HTTPS, allow passing args from generated set, use MRAN

pkgs/development/r-modules/generate-shell.nix

@@ -0,0 +1,16 @@
+with import <nixpkgs> {};
+
+stdenv.mkDerivation {
+  name = "generate-r-packages-shell";
+
+  buildCommand = "exit 1";
+
+  nativeBuildInputs = [ 
+    (rWrapper.override {
+      packages = with rPackages; [
+        data_table
+        parallel
+      ];
+    })
+  ];
+}