yaml-language-server: drop dev dependencies to reduce closure size

➜ nix path-info -hS ./result-before
/nix/store/ghv9p5gvafyma394gxacv8jjazy9k0ia-yaml-language-server-1.15.0  439.6 MiB

 ➜ nix path-info -hS ./result-after
/nix/store/lsxjzg66pcz4g8lrc9a5zyzbc0pf28yp-yaml-language-server-1.15.0  181.2 MiB

pkgs/development/tools/language-servers/yaml-language-server/default.nix

@@ -1,10 +1,14 @@
 { lib
-, mkYarnPackage
-, fetchYarnDeps
 , fetchFromGitHub
+, fetchYarnDeps
+, fixup-yarn-lock
+, makeWrapper
+, nodejs
+, stdenv
+, yarn
 }:
 
-mkYarnPackage rec {
+stdenv.mkDerivation rec {
   pname = "yaml-language-server";
   version = "1.15.0";
 
@@ -15,21 +19,54 @@ mkYarnPackage rec {
     hash = "sha256-Y3Q/y9UIiy7US8Jl4vxT0Pfw8h3hiXK+Cu9TEQHyAaA=";
   };
 
-  packageJSON = ./package.json;
   offlineCache = fetchYarnDeps {
     yarnLock = "${src}/yarn.lock";
     hash = "sha256-zHcxZ4VU6CGux72Nsy0foU4gFshK1wO/LTfnwOoirmg=";
   };
 
+  nativeBuildInputs = [
+    makeWrapper
+    fixup-yarn-lock
+    yarn
+  ];
+
+  buildInputs = [
+    nodejs
+  ];
+
+  configurePhase = ''
+    runHook preConfigure
+
+    export HOME=$(mktemp -d)
+    yarn config --offline set yarn-offline-mirror "$offlineCache"
+    fixup-yarn-lock yarn.lock
+    yarn --offline --frozen-lockfile --ignore-platform --ignore-scripts --no-progress --non-interactive install
+    patchShebangs node_modules
+
+    runHook postConfigure
+  '';
+
   buildPhase = ''
     runHook preBuild
 
-    export HOME=$(mktemp -d)
-    yarn --offline build
+    yarn --offline compile
+    yarn --offline build:libs
 
     runHook postBuild
   '';
 
+  installPhase = ''
+    runHook preInstall
+
+    yarn --offline --production install
+
+    mkdir -p $out/bin $out/lib/node_modules/yaml-language-server
+    cp -r . $out/lib/node_modules/yaml-language-server
+    ln -s $out/lib/node_modules/yaml-language-server/bin/yaml-language-server $out/bin/
+
+    runHook postInstall
+  '';
+
   meta = {
     changelog = "https://github.com/redhat-developer/yaml-language-server/blob/${src.rev}/CHANGELOG.md";
     description = "Language Server for YAML Files";