diff --git a/tracetools_analysis/launch/lifecycle_states.launch.py b/tracetools_analysis/launch/lifecycle_states.launch.py
index 6ca76f8..5058117 100644
--- a/tracetools_analysis/launch/lifecycle_states.launch.py
+++ b/tracetools_analysis/launch/lifecycle_states.launch.py
@@ -14,13 +14,13 @@
 
 """Example launch file for a lifecycle node state analysis."""
 
-from launch import LaunchDescription
+import launch
 from launch_ros.actions import Node
 from tracetools_launch.action import Trace
 
 
 def generate_launch_description():
-    return LaunchDescription([
+    return launch.LaunchDescription([
         Trace(
             session_name='lifecycle-node-state',
             events_kernel=[],
diff --git a/tracetools_analysis/launch/memory_usage.launch.py b/tracetools_analysis/launch/memory_usage.launch.py
index a408f2d..2c1426c 100644
--- a/tracetools_analysis/launch/memory_usage.launch.py
+++ b/tracetools_analysis/launch/memory_usage.launch.py
@@ -14,14 +14,14 @@
 
 """Example launch file for a memory_usage analysis."""
 
-from launch import LaunchDescription
+import launch
 from launch_ros.actions import Node
 from tracetools_launch.action import Trace
 from tracetools_trace.tools.names import DEFAULT_EVENTS_ROS
 
 
 def generate_launch_description():
-    return LaunchDescription([
+    return launch.LaunchDescription([
         Trace(
             session_name='memory-usage',
             events_ust=[
diff --git a/tracetools_analysis/launch/pingpong.launch.py b/tracetools_analysis/launch/pingpong.launch.py
index aac0055..ea017be 100644
--- a/tracetools_analysis/launch/pingpong.launch.py
+++ b/tracetools_analysis/launch/pingpong.launch.py
@@ -14,13 +14,13 @@
 
 """Example launch file for a callback duration analysis."""
 
-from launch import LaunchDescription
+import launch
 from launch_ros.actions import Node
 from tracetools_launch.action import Trace
 
 
 def generate_launch_description():
-    return LaunchDescription([
+    return launch.LaunchDescription([
         Trace(
             session_name='pingpong',
             events_kernel=[],
diff --git a/tracetools_analysis/launch/profile.launch.py b/tracetools_analysis/launch/profile.launch.py
index a31c6ae..345a0d5 100644
--- a/tracetools_analysis/launch/profile.launch.py
+++ b/tracetools_analysis/launch/profile.launch.py
@@ -14,7 +14,7 @@
 
 """Example launch file for a profiling analysis."""
 
-from launch import LaunchDescription
+import launch
 from launch_ros.actions import Node
 from tracetools_launch.action import Trace
 from tracetools_trace.tools.names import DEFAULT_CONTEXT
@@ -22,7 +22,7 @@ from tracetools_trace.tools.names import DEFAULT_EVENTS_ROS
 
 
 def generate_launch_description():
-    return LaunchDescription([
+    return launch.LaunchDescription([
         Trace(
             session_name='profile',
             events_ust=[