Upated to sqential execution of versions

Jenkinsfile

@@ -1,3 +1,6 @@
+String[] ImgReleaseList = ['3.13', 'edge']
+String[] ImgVariantList = ['Default-minmal', 'Default-default']
+
 pipeline {
     agent { label 'LXCBuilder' }
     parameters {
@@ -21,49 +24,28 @@ pipeline {
                 sh '''mkdir $WORKSPACE/REL'''
             }
         }
-        stage("Image Configs") {
+        stage('Image Configs'){
-            matrix {
-                axes {
-                    axis {
-                        name 'ImgRelease'
-                        values '3.13', 'edge'
-                    }
-                    axis {
-                        name 'ImgVariant'
-                        values 'Default-minmal', 'Default-default'
-                    }
-                }
-                // //Exclude unwanted conbinatinations
-                // excludes {
-                //     exclude {
-                //         axis {
-                //             name 'ImgRelease'
-                //             values 'edge'
-                //         }
-                //         axis {
-                //             name 'ImgVariant'
-                //             //use notValues to invert
-                //             values 'Extra-extended'
-                //         }
-                //     }
-                // }
-                stages {
-                    stage('Build image') {
-                        when {
-                            //ImgTypeTest
-                            anyOf {
-                                allOf {
-                                    expression { return (env.ImgVariant).startsWith('Default-') } 
-                                    environment name: 'BuildDefault', value: 'true'
-                                }
-                                allOf {
-                                    expression { return (env.ImgVariant).startsWith('Extra-') }
-                                    environment name: 'BuildExtra', value: 'true'
-                                }
-                            }
-                        }
             steps{
-                        // Build script
+                script{
+                    for(ImgRelease in ImgReleaseList){
+                        for(ImgVariant in ImgVariantList){
+                            //ImgTypeTest
+                            if (env.BuildDefault == 'true' && (ImgVariant).startsWith('Default-')) {
+                                BuildThis = true
+                            } else if (env.BuildExtra == 'true' && (ImgVariant).startsWith('Extra-'))  {
+                                BuildThis = true
+                            } else {
+                                BuildThis = false
+                            }
+                            //Exclude unwanted conbinatinations
+                            // if (ImgRelease == 'buster' && ImgVariant == 'Default-default' ){
+                            //     BuildThis = false
+                            // }
+                            //Check if this combinations shoud be build 
+    	                    if (BuildThis == true) {
+                                env.ImgRelease = ImgRelease
+                                env.ImgVariant = ImgVariant
+                                stage('Build image') {
                                     catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
                                         sh '''echo "$(date) Do Build for $ImgRelease - $ImgVariant"
                                         ImgVariantName=${ImgVariant#Default-} && ImgVariantName=${ImgVariantName#Extra-}
@@ -77,6 +59,8 @@ pipeline {
                         }
                     }
                 }
+            }
+        }
         stage('Finish') {
             steps {
             // Save generated files