elmPackages.elm-language-server: Init at 1.4.1

pkgs/development/compilers/elm/default.nix

@@ -56,6 +56,8 @@ let
             */
             elm-test = patchBinwrap [elmi-to-json] elmNodePackages.elm-test;
             elm-verify-examples = patchBinwrap [elmi-to-json] elmNodePackages.elm-verify-examples;
+            elm-language-server = elmNodePackages."@elm-tooling/elm-language-server";
+
             # elm-analyse@0.16.4 build is not working
             elm-analyse = elmNodePackages."elm-analyse-0.16.3";
             inherit (elmNodePackages) elm-doc-preview elm-live elm-upgrade elm-xref;

pkgs/development/compilers/elm/packages/node-composition.nix

@@ -2,7 +2,7 @@
 
 {pkgs ? import <nixpkgs> {
     inherit system;
-  }, system ? builtins.currentSystem, nodejs ? pkgs.nodejs-10_x}:
+  }, system ? builtins.currentSystem, nodejs ? pkgs."nodejs-10_x"}:
 
 let
   nodeEnv = import ../../../node-packages/node-env.nix {

pkgs/development/compilers/elm/packages/node-packages.json

@@ -5,5 +5,6 @@
     "elm-upgrade",
     { "elm-analyse": "0.16.3" },
     "elm-live",
-    "elm-xref"
+    "elm-xref",
+    "@elm-tooling/elm-language-server"
 ]