diff --git a/jaraco/vcs/subprocess.py b/jaraco/vcs/subprocess.py
index 5f5bdb6..0959d80 100644
--- a/jaraco/vcs/subprocess.py
+++ b/jaraco/vcs/subprocess.py
@@ -1,8 +1,6 @@
 import os
 import subprocess
 
-from jaraco.collections import Mask
-
 from . import base
 from . import cmd
 
@@ -36,18 +34,6 @@ class Mercurial(Subprocess, cmd.Mercurial, base.Repo):
 
     priority = 1 + os.path.isdir('.hg')
 
-    @property
-    def env(self):
-        """
-        Return an environment safe for calling an `hg` subprocess.
-
-        Removes MACOSX_DEPLOYMENT_TARGET from the env, as if there's a
-        mismatch between the local Python environment and the environment
-        in which `hg` is installed, it will cause an exception. See
-        https://github.com/jaraco/jaraco.vcs/issues/7 for details.
-        """
-        return Mask(['MACOSX_DEPLOYMENT_TARGET'], os.environ)
-
 
 class Git(Subprocess, cmd.Git, base.Repo):
     """
diff --git a/newsfragments/7.feature.rst b/newsfragments/7.feature.rst
new file mode 100644
index 0000000..431e977
--- /dev/null
+++ b/newsfragments/7.feature.rst
@@ -0,0 +1 @@
+Remove mask for environment when invoking hg as the underlying issue has been corrected.
\ No newline at end of file
diff --git a/setup.cfg b/setup.cfg
index 9044e7b..faa7f9a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -22,7 +22,6 @@ install_requires =
 	jaraco.classes
 	more_itertools
 	jaraco.versioning
-	jaraco.collections
 
 [options.packages.find]
 exclude =