diff --git a/README.md b/README.md
index 25378da..b04a961 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ and setup your python environment.
 ```bash
 sudo -i
 pip3 install --user .
-( cd scenarios && pip3 install -r requirements.txt )
+( cd scenarios && pip3 install --user -r requirements.txt )
 ```
 
 Sometimes, it is required to add manually your local python lib folder to the environment:
diff --git a/mknet b/mknet
index 34608a3..5c09a18 100755
--- a/mknet
+++ b/mknet
@@ -315,6 +315,7 @@ def runall(cmd):
     zones = parse(config).zones
 
     number = 1
+    wait_list = [ ]
     for zone in zones.values():
         if zone.is_zone():
             for server in zone.servers.values():
@@ -325,7 +326,7 @@ def runall(cmd):
                 env["ID"] = str(number)
                 env["SERVER_COUNT"] = str(len(config['servers']))
                 name = f'testnet-{zone.name}-{server.name}'
-                net.ns.run(name, cmd, env)
+                wait_list.append(net.ns.run(name, cmd, env))
                 number +=1
         else:
             env = os.environ.copy()
@@ -335,9 +336,12 @@ def runall(cmd):
             env["ID"] = str(number)
             env["SERVER_COUNT"] = str(len(config['servers']))
             name = f'testnet-{zone.name}-{zone.name}'
-            net.ns.run(name, cmd, env)
+            wait_list.append(net.ns.run(name, cmd, env))
             first = False
             number +=1
+    for p in wait_list:
+        p.wait()
+    print("runall done")
 
 def destroy():
     for ns in net.ns.list():
diff --git a/net.py b/net.py
index 8e8725b..f78f7a6 100644
--- a/net.py
+++ b/net.py
@@ -37,7 +37,7 @@ class ns:
         run_netns("exec", name, "ip", "link", "set", "dev", "lo", "up")
 
     def run(name, cmd, env=None):
-        subprocess.Popen(_netns + ["exec", name] + cmd, env=env)
+        return subprocess.Popen(_netns + ["exec", name] + cmd, env=env)
 
 def create_bridge(name, namespace, ports=[]):
     run_netns("exec", namespace, "ip", "link", "add", "name", name, "type", "bridge")