nixpkgs.vimPlugins.dhall-vim is already in nixpkgs

pkgs/vim/default.nix

@@ -10,16 +10,6 @@ with pkgs;
 
 let
   plugins = let inherit (vimUtils) buildVimPluginFrom2Nix; in {
-  "vim-dhall" = buildVimPluginFrom2Nix { # created by nix#NixDerivation
-    name = "vim-dhall";
-    src = fetchFromGitHub {
-      owner = "vmchale";
-      repo = "dhall-vim";
-      rev = "ef31cfee6d8c555d44d282e4cec1367512ad7fe9";
-      sha256 = "0r7y614xld5spgpa4c8ms4rm1p8xzsayp91j4jiqhxn6ly6igv7f";
-    };
-    dependencies = [];
-  };
   "vim-terraform" = buildVimPluginFrom2Nix { # created by nix#NixDerivation
     name = "vim-terraform";
     src = fetchFromGitHub {
@@ -84,6 +74,7 @@ let
         Solarized
         better-whitespace
         calendar-vim
+        dhall-vim
         elm-vim
         fzf-vim
         fzfWrapper
@@ -94,7 +85,6 @@ let
         systemd-syntax
         vim-airline
         vim-airline-themes
-        vim-dhall
         vim-gnupg
         vim-nix
         vim-orgmode