diff --git a/charmtools/build/builder.py b/charmtools/build/builder.py
index a0749ec..9eaddbc 100755
--- a/charmtools/build/builder.py
+++ b/charmtools/build/builder.py
@@ -785,8 +785,8 @@ def workaround_charmcraft_maybe_ensure_build_packages(self):
                 and (os.environ.get('CRAFT_PART_NAME', None)
                      or os.environ.get('CHARMCRAFT_PART_NAME', None))):
             log.warning('Probably running as root in charmcraft, proactively '
-                        'installing the `git` and `virutalenv` packages.')
-            subprocess.run(('apt', '-y', 'install', 'git', 'virtualenv'), check=True)
+                        'installing the `git` and `virtualenv` packages.')
+            subprocess.run(('apt', '-y', 'install', 'git', 'virtualenv'), check=True, env={})
 
     def generate(self):
         layers = self.fetch()