diff --git a/lttngpy/CMakeLists.txt b/lttngpy/CMakeLists.txt
index deacf8fc..ccc1d12f 100644
--- a/lttngpy/CMakeLists.txt
+++ b/lttngpy/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.12)
+cmake_minimum_required(VERSION 3.20)
project(lttngpy)
@@ -15,15 +15,6 @@ if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
add_compile_options(-Wall -Wextra -Wpedantic)
endif()
-# Figure out Python3 debug/release before anything else can find_package it
-if(WIN32 AND CMAKE_BUILD_TYPE STREQUAL "Debug")
- find_package(python_cmake_module REQUIRED)
- find_package(PythonExtra REQUIRED)
-
- # Force FindPython3 to use the debug interpreter where ROS 2 expects it
- set(Python3_EXECUTABLE "${PYTHON_EXECUTABLE_DEBUG}")
-endif()
-
find_package(ament_cmake REQUIRED)
if(WIN32 OR APPLE OR ANDROID)
@@ -36,6 +27,21 @@ option(
"Explicitly disable support, don't link against liblttng-ctl"
${DISABLED_DEFAULT})
+# By default, without the settings below, find_package(Python3) will attempt
+# to find the newest python version it can, and additionally will find the
+# most specific version. For instance, on a system that has
+# /usr/bin/python3.10, /usr/bin/python3.11, and /usr/bin/python3, it will find
+# /usr/bin/python3.11, even if /usr/bin/python3 points to /usr/bin/python3.10.
+# The behavior we want is to prefer the "system" installed version unless the
+# user specifically tells us othewise through the Python3_EXECUTABLE hint.
+# Setting CMP0094 to NEW means that the search will stop after the first
+# python version is found. Setting Python3_FIND_UNVERSIONED_NAMES means that
+# the search will prefer /usr/bin/python3 over /usr/bin/python3.11. And that
+# latter functionality is only available in CMake 3.20 or later, so we need
+# at least that version.
+cmake_policy(SET CMP0094 NEW)
+set(Python3_FIND_UNVERSIONED_NAMES FIRST)
+
# Find python before pybind11
find_package(Python3 REQUIRED COMPONENTS Interpreter Development)
diff --git a/lttngpy/package.xml b/lttngpy/package.xml
index b076eb25..350594c3 100644
--- a/lttngpy/package.xml
+++ b/lttngpy/package.xml
@@ -13,7 +13,6 @@
ament_cmake
pkg-config
- python_cmake_module
liblttng-ctl-dev