diff --git a/lmm/overlayfs.py b/lmm/overlayfs.py
index ee159cc..ed7fdae 100644
--- a/lmm/overlayfs.py
+++ b/lmm/overlayfs.py
@@ -102,26 +102,30 @@ class OverlayFSMount:
         self._mounted = True
         return self.mount_path
 
-    def unmount(self):
+    def unmount(self) -> bool:
         if self._mounted:
             print("Unmounting...")
 
             # Remove the mount
             if LMMConfig.use_fuse:
-                run_cmd(
+                returncode = run_cmd(
                     [
                         LMMConfig.fusermount_command,
                         "-u",
                         str(self.mount_path),
                     ]
-                )
+                ) == 0
             else:
-                run_sudo_cmd(
+                returncode = run_sudo_cmd(
                     [
                         "umount",
                         str(self.mount_path),
                     ]
                 )
+            
+            if returncode != 0:
+                print("Unmounting failed")
+                return False
 
             # Remove the temporary workdir
             if self.workdir is not None:
@@ -132,6 +136,7 @@ class OverlayFSMount:
                     print(f"Failed to clean temporary directory {self.workdir.name}")
 
             self._mounted = False
+            return True
 
     def __del__(self):
         self.unmount()