diff --git a/lxc-build b/lxc-build
index 9bc2c52..d9eb5d1 100755
--- a/lxc-build
+++ b/lxc-build
@@ -83,7 +83,7 @@ def run_script():
     with open(script_filename, 'w') as fd:
         fd.write(' && '.join([s for s in script]))
     os.chmod(script_filename, 0o700)
-    subprocess.run(['lxc-execute', '-n', image, '--', '/bin/sh', '-lc', '/run.sh'], check=True)
+    subprocess.run(['lxc-execute', '-n', image, '--', '/bin/sh', '-lvc', '/run.sh'], check=True)
     os.unlink(script_filename)
 
 def copy_files(src, dst):
@@ -98,8 +98,8 @@ for line in recipe:
     if line == 'RUN':
         in_script = False
         run_script()
-    elif in_script and not line and not line.startswith('#'):
-        script.append()
+    elif in_script and line and not line.startswith('#'):
+        script.append(line)
     elif line == 'SCRIPT':
         script = []
         in_script = True