diff --git a/Jenkinsfile b/Jenkinsfile
index 2b53bf4..bf70f57 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -80,7 +80,6 @@ node('test')
 {
 	
 	//currentbuild.result = 'SUCCESS'
-   /*
    stage('checkout')
    {
 		if(pre_clean)
@@ -96,34 +95,36 @@ node('test')
 		}
 	}
 	
-	stage('pre-build')
+	if(isBuildNeeded)
 	{
-		sh label: 'patch_sources', script: 'cd ' + git_folder + '; patch -p1 < ../' + patch
-		sh label: 'feeds_update', script: 'cd ' + git_folder + '; ./scripts/feeds update -a'
-		sh label: 'feeds_install', script: 'cd ' + git_folder + '; ./scripts/feeds install -a'
-	
+		stage('pre-build')
+		{
+			sh label: 'patch_sources', script: 'cd ' + git_folder + '; patch -p1 < ../' + patch
+			sh label: 'feeds_update', script: 'cd ' + git_folder + '; ./scripts/feeds update -a'
+			sh label: 'feeds_install', script: 'cd ' + git_folder + '; ./scripts/feeds install -a'
+		
+		}
+		
+		stage('build')
+		{
+			//step
+			//{
+			sh label: 'copy_config', script: 'cp ' + config_path + 'tl_wr841_v11_config ' + git_folder + '/.config'
+			sh label: 'build_v11', script: 'cd ' + git_folder + '; make oldconfig; make -j13 V=s'
+			//}
+			//step
+			//{
+			sh label: 'copy_config', script: 'cp ' + config_path + 'tl_wr841_v12_config ' + git_folder + '/.config'
+			sh label: 'build_v12', script: 'cd ' + git_folder + '; make oldconfig; make -j13 V=s'
+			//}
+		}
+		
+		
+		stage('move_bin_to_ftp')
+		{
+			sh label: 'copy_binaries', script: 'python ' + scripts_path + 'sftp_test.py -a ' + sftp_host + ' -u ' + sftp_user + ' -p ' + sftp_passwd + ' -g ' + git_folder + ' -f ' + scripts_path + known_hosts + ' -l ' + sftp_path + ' -c ' + bin_path
+		}
 	}
-	
-	stage('build')
-	{
-		//step
-		//{
-		sh label: 'copy_config', script: 'cp ' + config_path + 'tl_wr841_v11_config ' + git_folder + '/.config'
-		sh label: 'build_v11', script: 'cd ' + git_folder + '; make oldconfig; make -j13 V=s'
-		//}
-		//step
-		//{
-		sh label: 'copy_config', script: 'cp ' + config_path + 'tl_wr841_v12_config ' + git_folder + '/.config'
-		sh label: 'build_v12', script: 'cd ' + git_folder + '; make oldconfig; make -j13 V=s'
-		//}
-	}
-	*/
-	
-	stage('move_bin_to_ftp')
-	{
-		sh label: 'copy_binaries', script: 'python ' + scripts_path + 'sftp_test.py -a ' + sftp_host + ' -u ' + sftp_user + ' -p ' + sftp_passwd + ' -g ' + git_folder + ' -f ' + scripts_path + known_hosts + ' -l ' + sftp_path + ' -c ' + bin_path
-	}
-
    
    
    if(post_clean)
@@ -144,7 +145,7 @@ node('test')
       //logger.printInfo('job is getting deleted ' + currentBuild.id.toString())//job.nextBuildNumber)
       job.nextBuildNumber -= 1 //updateNextBuildNumber(job.getNextBuildNumber() - 1)      //resetting next build number does not work. if done, the next build start will do nothing
       //job.saveNextBuildNumber()
-      //job.updateNextBuildNumber(job.nextBuildNumber - 1)
+      job.updateNextBuildNumber(job.nextBuildNumber - 1)
       printDebug('NUMBER_after:' + job.nextBuildNumber)
       job.getLastBuild().delete()
       job.save()