diff --git a/mercurial/posix.py b/mercurial/posix.py
--- a/mercurial/posix.py
+++ b/mercurial/posix.py
@@ -105,7 +105,7 @@ def setflags(f, l, x):
             fp = open(f)
             data = fp.read()
             fp.close()
-            os.unlink(f)
+            unlink(f)
             try:
                 os.symlink(data, f)
             except OSError:
@@ -118,7 +118,7 @@ def setflags(f, l, x):
     if stat.S_ISLNK(s):
         # switch link to file
         data = os.readlink(f)
-        os.unlink(f)
+        unlink(f)
         fp = open(f, "w")
         fp.write(data)
         fp.close()
@@ -187,9 +187,9 @@ def checkexec(path):
                         # check-exec is exec and check-no-exec is not exec
                         return True
                     # checknoexec exists but is exec - delete it
-                    os.unlink(checknoexec)
+                    unlink(checknoexec)
                 # checkisexec exists but is not exec - delete it
-                os.unlink(checkisexec)
+                unlink(checkisexec)
 
             # check using one file, leave it as checkisexec
             checkdir = cachedir
@@ -210,7 +210,7 @@ def checkexec(path):
                     return True
         finally:
             if fn is not None:
-                os.unlink(fn)
+                unlink(fn)
     except (IOError, OSError):
         # we don't care, the user probably won't be able to commit anyway
         return False
@@ -248,12 +248,12 @@ def checklink(path):
             try:
                 os.symlink(target, name)
                 if cachedir is None:
-                    os.unlink(name)
+                    unlink(name)
                 else:
                     try:
                         os.rename(name, checklink)
                     except OSError:
-                        os.unlink(name)
+                        unlink(name)
                 return True
             except OSError as inst:
                 # link creation might race, try again
@@ -268,7 +268,7 @@ def checklink(path):
         except OSError as inst:
             # sshfs might report failure while successfully creating the link
             if inst[0] == errno.EIO and os.path.exists(name):
-                os.unlink(name)
+                unlink(name)
             return False
 
 def checkosfilename(path):
@@ -539,7 +539,7 @@ def makedir(path, notindexed):
 def unlinkpath(f, ignoremissing=False):
     """unlink and remove the directory if it is empty"""
     try:
-        os.unlink(f)
+        unlink(f)
     except OSError as e:
         if not (ignoremissing and e.errno == errno.ENOENT):
             raise