diff --git a/hgext/largefiles/uisetup.py b/hgext/largefiles/uisetup.py
--- a/hgext/largefiles/uisetup.py
+++ b/hgext/largefiles/uisetup.py
@@ -153,7 +153,7 @@ def uisetup(ui):
     httppeer.httppeer._callstream = proto.httprepocallstream
 
     # don't die on seeing a repo with the largefiles requirement
-    localrepo.localrepository.supported |= set(['largefiles'])
+    localrepo.localrepository._basesupported |= set(['largefiles'])
 
     # override some extensions' stuff as well
     for name, module in extensions.extensions():
diff --git a/mercurial/localrepo.py b/mercurial/localrepo.py
--- a/mercurial/localrepo.py
+++ b/mercurial/localrepo.py
@@ -146,12 +146,14 @@ class locallegacypeer(localpeer):
 class localrepository(object):
 
     supportedformats = set(('revlogv1', 'generaldelta'))
-    supported = supportedformats | set(('store', 'fncache', 'shared',
-                                        'dotencode'))
+    _basesupported = supportedformats | set(('store', 'fncache', 'shared',
+                                             'dotencode'))
     openerreqs = set(('revlogv1', 'generaldelta'))
     requirements = ['revlogv1']
     filtername = None
 
+    featuresetupfuncs = set()
+
     def _baserequirements(self, create):
         return self.requirements[:]
 
@@ -176,6 +178,13 @@ class localrepository(object):
         except IOError:
             pass
 
+        if self.featuresetupfuncs:
+            self.supported = set(self._basesupported) # use private copy
+            for setupfunc in self.featuresetupfuncs:
+                setupfunc(self.ui, self.supported)
+        else:
+            self.supported = self._basesupported
+
         if not self.vfs.isdir():
             if create:
                 if not self.wvfs.exists():
@@ -1649,6 +1658,14 @@ class localrepository(object):
         return r
 
     def pull(self, remote, heads=None, force=False):
+        if remote.local():
+            missing = set(remote.requirements) - self.supported
+            if missing:
+                msg = _("required features are not"
+                        " supported in the destination:"
+                        " %s") % (', '.join(sorted(missing)))
+                raise util.Abort(msg)
+
         # don't open transaction for nothing or you break future useful
         # rollback call
         tr = None
@@ -1749,6 +1766,14 @@ class localrepository(object):
             we have outgoing changesets but refused to push
           - other values as described by addchangegroup()
         '''
+        if remote.local():
+            missing = set(self.requirements) - remote.local().supported
+            if missing:
+                msg = _("required features are not"
+                        " supported in the destination:"
+                        " %s") % (', '.join(sorted(missing)))
+                raise util.Abort(msg)
+
         # there are two ways to push to remote repo:
         #
         # addchangegroup assumes local user can lock remote
diff --git a/mercurial/statichttprepo.py b/mercurial/statichttprepo.py
--- a/mercurial/statichttprepo.py
+++ b/mercurial/statichttprepo.py
@@ -89,6 +89,8 @@ class statichttppeer(localrepo.localpeer
         return False
 
 class statichttprepository(localrepo.localrepository):
+    supported = localrepo.localrepository._basesupported
+
     def __init__(self, ui, path):
         self._url = path
         self.ui = ui
diff --git a/tests/test-requires.t b/tests/test-requires.t
--- a/tests/test-requires.t
+++ b/tests/test-requires.t
@@ -15,5 +15,55 @@
   $ hg tip
   abort: unknown repository format: requires features 'indoor-pool', 'outdoor-pool' (upgrade Mercurial)!
   [255]
+  $ cd ..
+
+Test checking between features supported locally and ones required in
+another repository of push/pull/clone on localhost:
+
+  $ mkdir supported-locally
+  $ cd supported-locally
+
+  $ hg init supported
+  $ echo a > supported/a
+  $ hg -R supported commit -Am '#0 at supported'
+  adding a
+
+  $ echo 'featuresetup-test' >> supported/.hg/requires
+  $ cat > $TESTTMP/supported-locally/supportlocally.py <<EOF
+  > from mercurial import localrepo, extensions
+  > def featuresetup(ui, supported):
+  >     for name, module in extensions.extensions(ui):
+  >         if __name__ == module.__name__:
+  >             # support specific feature locally
+  >             supported |= set(['featuresetup-test'])
+  >             return
+  > def uisetup(ui):
+  >     localrepo.localrepository.featuresetupfuncs.add(featuresetup)
+  > EOF
+  $ cat > supported/.hg/hgrc <<EOF
+  > [extensions]
+  > # enable extension locally
+  > supportlocally = $TESTTMP/supported-locally/supportlocally.py
+  > EOF
+  $ hg -R supported status
+
+  $ hg init push-dst
+  $ hg -R supported push push-dst
+  pushing to push-dst
+  abort: required features are not supported in the destination: featuresetup-test
+  [255]
+
+  $ hg init pull-src
+  $ hg -R pull-src pull supported
+  pulling from supported
+  abort: required features are not supported in the destination: featuresetup-test
+  [255]
+
+  $ hg clone supported clone-dst
+  abort: unknown repository format: requires features 'featuresetup-test' (upgrade Mercurial)!
+  [255]
+  $ hg clone --pull supported clone-dst
+  abort: required features are not supported in the destination: featuresetup-test
+  [255]
 
   $ cd ..