2 files changed, 6 insertions, 1 deletions
diff --git a/README.md b/README.md
index 0ae49a4..358f5e6 100644
--- a/README.md
+++ b/README.md
@@ -83,7 +83,7 @@ You can test your new system with
 
 Then, if everything is fine, stop the guest and turn it on again, this time with
 
-    kvmx up <guest>
+    kvmx up <project-name>
 
 ## Further development
 
diff --git a/kvmx b/kvmx
index 0b8dc14..64746a3 100755
--- a/kvmx
+++ b/kvmx
@@ -1298,6 +1298,11 @@ function kvmx_mv {
 
 # Install system
 function kvmx_install {
+  if kvmx_running; then
+    echo "$BASENAME: guest $VM is running"
+    exit 1
+  fi
+
   local media="$3"
 
   if [ -z "$media" ]; then