Maybe we need a tar and a zip helper

vars/packageStep.groovy

@@ -3,20 +3,28 @@
 void call(Map config = [:], Closure body) {
     Map defaults = [
         name: env.BUILD_TAG,
-        archiveCmd: 'tar zcvf',
+        archiveCmd: 'tar',
+        archiveParams: 'zcvf',
         extension: 'tgz',
-        artifacts: []
+        artifacts: [],
+        stepName: 'Package',
+        separator: '-'
     ]
-
     Map runConfig = defaults + config
     stage(runConfig.stepName) {
         printBanner(runConfig.stepName)
-        String archiveName = "${runConfig.name}-${runConfig.tag}.${runConfig.extension}"
+        if (runConfig.artifacts.size() < 1) {
-
+            assert runConfig.artifacts : 'Error: No named artifacts to package!'
+        }
+        archiveName = runConfig.name + separator + runConfig.tag + separator + runConfig.extension
         echo "Will tag result as: ${archiveName}"
 
         sh """
-            ${runConfig.archiveCmd} ${archiveName} ${runConfig.artifacts.join(' ')}
+            if command -v "${runconfig.archiveCmd}"; then
+                ${runConfig.archiveCmd} ${archiveName} ${runConfig.artifacts.join(' ')}
+            else
+                echo "Error: ${runConfig.archiveCmd} is not a valid executable!"
+                exit 2
         """
         archiveArtifacts artifacts: archiveName, followSymlinks: false
         body()