diff --git a/infinitepush/__init__.py b/infinitepush/__init__.py
--- a/infinitepush/__init__.py
+++ b/infinitepush/__init__.py
@@ -149,6 +149,13 @@
 _scratchbranchmatcher = lambda x: False
 _maybehash = re.compile(r'^[a-f0-9]+$').search
 
+if util.safehasattr(util, '_hgexecutable'):
+    # Before 5be286db
+    _hgexecutable = util.hgexecutable
+else:
+    from mercurial.utils import procutil
+    _hgexecutable = procutil.hgexecutable
+
 def _buildexternalbundlestore(ui):
     put_args = ui.configlist('infinitepush', 'put_args', [])
     put_binary = ui.config('infinitepush', 'put_binary')
@@ -1352,7 +1359,7 @@
         nodesargs.append('--node')
         nodesargs.append(node)
     with open(os.devnull, 'w+b') as devnull:
-        cmdline = [util.hgexecutable(), 'debugfillinfinitepushmetadata',
+        cmdline = [_hgexecutable(), 'debugfillinfinitepushmetadata',
                    '-R', root] + nodesargs
         # Process will run in background. We don't care about the return code
         subprocess.Popen(cmdline, close_fds=True, shell=False,
diff --git a/remotefilelog/repack.py b/remotefilelog/repack.py
--- a/remotefilelog/repack.py
+++ b/remotefilelog/repack.py
@@ -31,8 +31,15 @@
 class RepackAlreadyRunning(error.Abort):
     pass
 
+if util.safehasattr(util, '_hgexecutable'):
+    # Before 5be286db
+    _hgexecutable = util.hgexecutable
+else:
+    from mercurial.utils import procutil
+    _hgexecutable = procutil.hgexecutable
+
 def backgroundrepack(repo, incremental=True, packsonly=False):
-    cmd = [util.hgexecutable(), '-R', repo.origroot, 'repack']
+    cmd = [_hgexecutable(), '-R', repo.origroot, 'repack']
     msg = _("(running background repack)\n")
     if incremental:
         cmd.append('--incremental')
diff --git a/remotefilelog/shallowrepo.py b/remotefilelog/shallowrepo.py
--- a/remotefilelog/shallowrepo.py
+++ b/remotefilelog/shallowrepo.py
@@ -25,6 +25,13 @@
 
 import os
 
+if util.safehasattr(util, '_hgexecutable'):
+    # Before 5be286db
+    _hgexecutable = util.hgexecutable
+else:
+    from mercurial.utils import procutil
+    _hgexecutable = procutil.hgexecutable
+
 requirement = "remotefilelog"
 _prefetching = _('prefetching')
 
@@ -182,7 +189,7 @@
                                opts=None):
             """Runs prefetch in background with optional repack
             """
-            cmd = [util.hgexecutable(), '-R', repo.origroot, 'prefetch']
+            cmd = [_hgexecutable(), '-R', repo.origroot, 'prefetch']
             if repack:
                 cmd.append('--repack')
             if revs: