fix listen on truffle compilation

libs/remix-ui/run-tab/src/lib/actions/events.ts

@@ -55,6 +55,8 @@ export const setupEvents = (plugin: RunTab, dispatch: React.Dispatch<any>) => {
 
   plugin.on('foundry', 'compilationFinished', (file, source, languageVersion, data) => broadcastCompilationResult('foundry', plugin, dispatch, file, source, languageVersion, data))
 
+  plugin.on('truffle', 'compilationFinished', (file, source, languageVersion, data) => broadcastCompilationResult('truffle', plugin, dispatch, file, source, languageVersion, data))
+
   plugin.on('udapp', 'setEnvironmentModeReducer', (env: { context: string, fork: string }, from: string) => {
     plugin.call('notification', 'toast', envChangeNotification(env, from))
     setExecutionContext(plugin, dispatch, env)

libs/remixd/src/services/truffleClient.ts

@@ -60,7 +60,7 @@ export class TruffleClient extends PluginClient {
 
   listenOnTruffleCompilation () {
     try {
-      const buildPath = utils.absolutePath('out', this.currentSharedFolder)
+      const buildPath = utils.absolutePath('build/contracts', this.currentSharedFolder)
       this.watcher = chokidar.watch(buildPath, { depth: 3, ignorePermissionErrors: true, ignoreInitial: true })
       const compilationResult = {
         input: {},