diff --git a/constants.py b/constants.py
index e418209..27236be 100644
--- a/constants.py
+++ b/constants.py
@@ -155,6 +155,7 @@ WRAPPER_TYPES = [
     'none',
     'docker',
 ]
+WRAPPER_ENV_VAR = 'KUPFERBOOTSTRAP_WRAPPED'
 
 MAKEPKG_CMD = [
     'makepkg',
diff --git a/wrapper/wrapper.py b/wrapper/wrapper.py
index 06d0d23..cd1af05 100644
--- a/wrapper/wrapper.py
+++ b/wrapper/wrapper.py
@@ -7,7 +7,7 @@ from typing import Protocol
 
 from config import config
 from config.state import dump_file as dump_config_file
-from constants import CHROOT_PATHS
+from constants import CHROOT_PATHS, WRAPPER_ENV_VAR
 
 WRAPPER_PATHS = CHROOT_PATHS | {
     'ccache': '/ccache',
@@ -99,7 +99,7 @@ class BaseWrapper(Wrapper):
         raise NotImplementedError()
 
     def is_wrapped(self):
-        return os.getenv('KUPFERBOOTSTRAP_WRAPPED') == self.type.upper()
+        return os.getenv(WRAPPER_ENV_VAR) == self.type.upper()
 
     def get_bind_mounts_default(self, wrapped_config_path: str = None, ssh_dir: str = None, target_home: str = '/root'):
         wrapped_config_path = wrapped_config_path or self.wrapped_config_path