diff --git a/vars/buildStep.groovy b/vars/buildStep.groovy
index 3fbdcd9..c5ffc53 100644
--- a/vars/buildStep.groovy
+++ b/vars/buildStep.groovy
@@ -1,6 +1,6 @@
 #!/usr/bin/env groovy
 
-void call(Map config = [:], Closure body) {
+void call(Map config = [:], Closure body = { }) {
     Map defaults = [
         saveArtifaces: false,
         buildTest: 'Makefile',
diff --git a/vars/checkoutStep.groovy b/vars/checkoutStep.groovy
index 191c797..369cf7d 100644
--- a/vars/checkoutStep.groovy
+++ b/vars/checkoutStep.groovy
@@ -1,6 +1,6 @@
 #!/usr/bin/env groovy
 
-void call(Map config = [:], Closure body) {
+void call(Map config = [:], Closure body = { }) {
     Map defaults = [
         stepName: 'Checkout',
         useJobSCM: true
diff --git a/vars/packageStep.groovy b/vars/packageStep.groovy
index 9c85ec4..7553a92 100644
--- a/vars/packageStep.groovy
+++ b/vars/packageStep.groovy
@@ -1,6 +1,6 @@
 #!/usr/bin/env groovy
 
-void call(Map config = [:], Closure body) {
+void call(Map config = [:], Closure body = { }) {
     Map defaults = [
         name: env.BUILD_TAG,
         archiveCmd: 'tar',
@@ -16,15 +16,16 @@ void call(Map config = [:], Closure body) {
         if (runConfig.artifacts.size() < 1) {
             assert runConfig.artifacts : 'Error: No named artifacts to package!'
         }
-        archiveName = runConfig.name + separator + runConfig.tag + separator + runConfig.extension
+        archiveName = runConfig.name + runConfig.separator + runConfig.tag + runConfig.separator + runConfig.extension
         echo "Will tag result as: ${archiveName}"
 
         sh """
-            if command -v "${runconfig.archiveCmd}"; then
-                ${runConfig.archiveCmd} ${archiveName} ${runConfig.artifacts.join(' ')}
+            if command -v "${runConfig.archiveCmd}"; then
+                ${runConfig.archiveCmd} ${runConfig.archiveParams} ${archiveName} ${runConfig.artifacts.join(' ')}
             else
                 echo "Error: ${runConfig.archiveCmd} is not a valid executable!"
                 exit 2
+            fi
         """
         archiveArtifacts artifacts: archiveName, followSymlinks: false
         body()