diff --git a/Jenkinsfile b/Jenkinsfile
index 4472d79..74a27d1 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -2,6 +2,10 @@ pipeline {
     agent any
 
     stages {
+        stage('env'){
+            cleanWs()
+            checkout scm
+        }
         stage('nuget pack'){
             steps{
                 dotnetPack(outputDirectory: "./", project: "nugettest/")
@@ -24,7 +28,7 @@ pipeline {
         }
         stage('publish package'){
             steps{
-                dotnetNuGetPush(root: "./*.nupkg", source:"greyngitea")
+                dotnetNuGetPush(root: "./*.nupkg", source:"greyngitea", skipDuplicate:true)
             }
         }
     }