diff --git a/cpt/packager.py b/cpt/packager.py
index deca4e92..bdbf4b6f 100644
--- a/cpt/packager.py
+++ b/cpt/packager.py
@@ -234,7 +234,7 @@ def __init__(self, username=None, channel=None, runner=None,
         self._docker_image = docker_image or os.getenv("CONAN_DOCKER_IMAGE", None)
 
         # If CONAN_DOCKER_IMAGE is specified, then use docker is True
-        self.use_docker = (use_docker or os.getenv("CONAN_USE_DOCKER", False) or
+        self.use_docker = (use_docker or get_bool_from_env("CONAN_USE_DOCKER") or
                            self._docker_image is not None)
 
         self.docker_conan_home = docker_conan_home or os.getenv("CONAN_DOCKER_HOME", None)