i have low hopes for this

Jenkinsfile

@@ -5,7 +5,20 @@ pipeline {
         stage('nuget'){
             steps{
                 dotnetPack(outputDirectory: "./", project: "nugettest/")
-                dotnetNuGetPush()
+
+                def BUILD_NUMBER = "$BUILD_NUMBER"
+                sh """
+                    files=( ./*.nupkg)
+                    fullfilename=$(basename -- ${files[0]})
+                    noext=${fullfilename%.*}
+
+                    mv fullfilename $noext-$BUILD_NUMBER.nupkg
+
+                    files=null
+                    fullfilename=null
+                    noext=null
+                """
+                dotnetNuGetPush(root: "./")
             }
         }
     }