Update build.yml

.github/workflows/build.yml

@@ -260,7 +260,7 @@ jobs:
     - name: Update node-gyp
       run: |
         npm install --global node-gyp@8.4.1
-        for /f "delims=" %P in ('npm prefix -g') do npm config set node_gyp "%P\node_modules\node-gyp\bin\node-gyp.js"
+        npm prefix -g | % {npm config set node_gyp "$_\node_modules\node-gyp\bin\node-gyp.js"}
 
     - name: Build
       shell: powershell