diff --git a/src/orca/ax_utilities_application.py b/src/orca/ax_utilities_application.py
index 60c172f78..e8dadf76d 100644
--- a/src/orca/ax_utilities_application.py
+++ b/src/orca/ax_utilities_application.py
@@ -189,7 +189,7 @@ class AXUtilitiesApplication:
 
         pid = AXUtilitiesApplication.get_process_id(app)
         try:
-            state = subprocess.getoutput(f"cat /proc/{pid}/status | grep State")
+            state = subprocess.getoutput(f"@cat@ /proc/{pid}/status | @grep@ State")
             state = state.split()[1]
         except Exception as error:
             tokens = [f"AXUtilitiesApplication: Exception checking state of pid {pid}: {error}"]
diff --git a/src/orca/debugging_tools_manager.py b/src/orca/debugging_tools_manager.py
index 740f1a690..85f74d2dc 100644
--- a/src/orca/debugging_tools_manager.py
+++ b/src/orca/debugging_tools_manager.py
@@ -243,7 +243,7 @@ class DebuggingToolsManager:
             else:
                 name = AXObject.get_name(app) or "[DEAD]"
             try:
-                cmdline = subprocess.getoutput(f"cat /proc/{pid}/cmdline")
+                cmdline = subprocess.getoutput(f"@cat@ /proc/{pid}/cmdline")
             except Exception as error:
                 cmdline = f"EXCEPTION: {error}"
             else:
diff --git a/src/orca/orca_bin.py.in b/src/orca/orca_bin.py.in
index 6cb4c7772..903b344f0 100755
--- a/src/orca/orca_bin.py.in
+++ b/src/orca/orca_bin.py.in
@@ -186,7 +186,7 @@ def inGraphicalDesktop():
 def otherOrcas():
     """Returns the pid of any other instances of Orca owned by this user."""
 
-    openFile = subprocess.Popen('pgrep -u %s -x orca' % os.getuid(),
+    openFile = subprocess.Popen('@pgrep@ -u %s -x orca' % os.getuid(),
                                 shell=True,
                                 stdout=subprocess.PIPE).stdout
     pids = openFile.read()
diff --git a/src/orca/orca_modifier_manager.py b/src/orca/orca_modifier_manager.py
index 3407be009..452297a3f 100644
--- a/src/orca/orca_modifier_manager.py
+++ b/src/orca/orca_modifier_manager.py
@@ -230,7 +230,7 @@ class OrcaModifierManager:
         debug.print_message(debug.LEVEL_INFO, msg, True)
 
         self.unset_orca_modifiers(reason)
-        with subprocess.Popen(["xkbcomp", os.environ["DISPLAY"], "-"],
+        with subprocess.Popen(["@xkbcomp@", os.environ["DISPLAY"], "-"],
                               stdout=subprocess.PIPE, stderr=subprocess.DEVNULL) as p:
             self._original_xmodmap, _ = p.communicate()
         self._create_orca_xmodmap()
@@ -262,7 +262,7 @@ class OrcaModifierManager:
             return
 
         self._caps_lock_cleared = False
-        with subprocess.Popen(["xkbcomp", "-w0", "-", os.environ["DISPLAY"]],
+        with subprocess.Popen(["@xkbcomp@", "-w0", "-", os.environ["DISPLAY"]],
                               stdin=subprocess.PIPE, stdout=None, stderr=None) as p:
             p.communicate(self._original_xmodmap)
 
@@ -325,7 +325,7 @@ class OrcaModifierManager:
             debug.print_message(debug.LEVEL_INFO, msg, True)
 
 
-            with subprocess.Popen(["xkbcomp", "-w0", "-", os.environ["DISPLAY"]],
+            with subprocess.Popen(["@xkbcomp@", "-w0", "-", os.environ["DISPLAY"]],
                               stdin=subprocess.PIPE, stdout=None, stderr=None) as p:
                 p.communicate(bytes('\n'.join(lines), 'UTF-8'))
         else: