diff --git a/core.netigso/src/org/netbeans/core/netigso/Netigso.java b/core.netigso/src/org/netbeans/core/netigso/Netigso.java
--- a/core.netigso/src/org/netbeans/core/netigso/Netigso.java
+++ b/core.netigso/src/org/netbeans/core/netigso/Netigso.java
@@ -141,11 +141,14 @@
             readBundles();
             
             Map configMap = new HashMap();
+            injectSystemProperties(configMap); // ensure we read system properties
             final String cache = getNetigsoCache().getPath();
             configMap.put(Constants.FRAMEWORK_STORAGE, cache);
             activator = new NetigsoActivator(this);
             configMap.put("netigso.archive", NetigsoArchiveFactory.DEFAULT.create(this)); // NOI18N
-            configMap.put("felix.log.level", "4"); // NOI18N
+            if (!configMap.containsKey("felix.log.level")) {
+              configMap.put("felix.log.level", "4"); // allow others to set log level
+            }
             configMap.put("felix.bootdelegation.classloaders", activator); // NOI18N
             String startLevel = FRAMEWORK_START_LEVEL();
             if (!startLevel.isEmpty()) {
@@ -190,6 +193,17 @@
         }
     }
 
+    private void injectSystemProperties(Map configProps) {
+        for (Enumeration e = System.getProperties().propertyNames(); e.hasMoreElements(); )
+        {
+            String key = e.nextElement().toString();
+            if (key.startsWith("felix.") || key.startsWith("org.osgi.framework."))
+            {
+                configProps.put(key, System.getProperty(key));
+            }
+        }
+    }
+
     private static Set<String> toActivate(Framework f, Collection<? extends Module> allModules) {
         ServiceReference sr = f.getBundleContext().getServiceReference("org.osgi.service.packageadmin.PackageAdmin"); // NOI18N
         if (sr == null) {