diff --git a/default.nix b/default.nix
index ea13f34..08251b4 100644
--- a/default.nix
+++ b/default.nix
@@ -1,26 +1,25 @@
-# { system ? builtins.currentSystem }:
 { sources ? import ./nix/sources.nix
 , pkgs ? import sources.nixpkgs { }
 , callPackage ? pkgs.callPackage
 }:
 
 let
-  cargoNix = callPackage ./Cargo.nix { };
+  cargoNix = callPackage ./Cargo.nix {
+    # defaultCrateOverrides = pkgs.defaultCrateOverrides // {
+    #   libgit2-sys = attrs: {
+    #     buildInputs = [ pkgs.openssl ];
+    #   };
+    # };
+  };
 
   hoc = cargoNix.rootCrate.build;
-
-  buildInputs = [ pkgs.openssl pkgs.cacert ];
-
-  # version = hoc.version;
-
-# in hoc.rootCrate.build
 in
 pkgs.symlinkJoin {
   name = hoc.name;
   version = hoc.crateVersion;
   paths = [ hoc ];
 
-  buildInputs = [ pkgs.openssl pkgs.cacert ];
+  # buildInputs = [ pkgs.openssl pkgs.cacert ];
 
   postBuild = ''
     rm -rf $out/bin/hoc.d
diff --git a/vm.nix b/vm.nix
new file mode 100644
index 0000000..5892d20
--- /dev/null
+++ b/vm.nix
@@ -0,0 +1,80 @@
+# Nix configuration for a VM to run a custom configured Vim
+#
+# It is intended as an example of building a VM that builds Vim for testing
+# and evaluation purposes. It does not represent a production or secure
+# deployment.
+
+{ sources ? import ./nix/sources.nix
+, pkgs ? import sources.nixpkgs { }
+, callPackage ? pkgs.callPackage
+, config
+, lib
+, ...
+}:
+  # config, pkgs, lib, ... }:
+
+let
+  hoc = pkgs.callPackage ./default.nix { };
+
+  # hoc = cargoNix.rootCrate.build;
+in
+{
+  environment = {
+    systemPackages = with pkgs; [
+      (
+        hoc
+        # import ./default.nix
+      )
+    ];
+  };
+
+
+  networking.hostName = "hoc";   # Define your hostname.
+
+  system.stateVersion = "19.09";    # The version of NixOS originally installed
+
+  # Set security options:
+  security = {
+    sudo = {
+      enable = true;                # Enable sudo
+      wheelNeedsPassword = false;   # Allow wheel members to run sudo without a passowrd
+    };
+  };
+
+  networking.firewall.allowedTCPPorts = [ 80 ];
+
+  # List services that you want to enable:
+  services.openssh = {
+    enable = true;                             # Enable the OpenSSH daemon.
+    #permitRootLogin = "yes";                  # Probably want to change this in production
+    #challengeResponseAuthentication = true;   # Probably want to change this in production
+    #passwordAuthentication = true;            # Probably want to change this in production
+    openFirewall = true;
+    hostKeys = [
+      {
+        path = "/etc/ssh/ssh_host_ed25519_key";   # Generate a key for the vm
+        type = "ed25519";                         # Use the current best key type
+      }
+    ];
+  };
+
+  # Users of the Vim VM:
+  users.mutableUsers = false;        # Remove any users not defined in here
+
+  users.users.root = {
+    password = "123456";             # Probably want to change this in production
+  };
+
+  # Misc groups:
+  users.groups.nixos.gid = 1000;
+
+  # NixOS users
+  users.users.nixos = {
+    isNormalUser = true;
+    uid = 1000;
+    group = "nixos";
+    extraGroups = [ "wheel" ];
+    password = "123456";             # Probably want to change this in production
+  };
+
+}