diff --git a/ecleankernel/bootloader/grub.py b/ecleankernel/bootloader/grub.py
index cc5f7c2..9461ec4 100644
--- a/ecleankernel/bootloader/grub.py
+++ b/ecleankernel/bootloader/grub.py
@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 
 import logging
-import os.path
+import os
 import typing
 
 from ecleankernel.bootloader.lilo import LILO
@@ -11,7 +11,7 @@
 class GRUB(LILO):
     name = 'grub'
     kernel_re = r'^\s*(kernel|module)\s*(\([^)]+\))?(?P<path>\S+)'
-    def_path = ('/boot/grub/menu.lst', '/boot/grub/grub.conf')
+    def_path = (os.getenv("GRUB_CFG"), '/boot/grub/menu.lst', '/boot/grub/grub.conf')
 
     def _get_kernels(self,
                      content: str
diff --git a/ecleankernel/bootloader/grub2.py b/ecleankernel/bootloader/grub2.py
index 146cece..609dea8 100644
--- a/ecleankernel/bootloader/grub2.py
+++ b/ecleankernel/bootloader/grub2.py
@@ -2,6 +2,7 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 
 import logging
+import os
 import subprocess
 import typing
 
@@ -17,7 +18,7 @@
 class GRUB2(GRUB):
     name = 'grub2'
     kernel_re = r'^\s*linux\s*(\([^)]+\))?(?P<path>\S+)'
-    def_path = ('/boot/grub/grub.cfg', '/boot/grub2/grub.cfg')
+    def_path = (os.getenv("GRUB_CFG"), '/boot/grub/grub.cfg', '/boot/grub2/grub.cfg')
 
     def __init__(self) -> None:
         super().__init__()
diff --git a/ecleankernel/bootloader/lilo.py b/ecleankernel/bootloader/lilo.py
index ff35b10..64ebdae 100644
--- a/ecleankernel/bootloader/lilo.py
+++ b/ecleankernel/bootloader/lilo.py
@@ -11,7 +11,7 @@
 class LILO(Bootloader):
     name = 'lilo'
     kernel_re = r'^\s*image\s*=\s*(?P<path>.+)\s*$'
-    def_path: typing.Tuple[str, ...] = ('/etc/lilo.conf',)
+    def_path: typing.Tuple[typing.Union[str, None], ...] = ('/etc/lilo.conf',)
 
     def __init__(self,
                  path: typing.Optional[str] = None
@@ -23,14 +23,15 @@ def __init__(self,
             paths = (paths,)
 
         for p in paths:
-            try:
-                with open(p) as f:
-                    logging.debug(f'{p} found')
-                    self.path = p
-                    self._content = f.read()
-                    break
-            except FileNotFoundError:
-                pass
+            if p:
+                try:
+                    with open(p) as f:
+                        logging.debug(f'{p} found')
+                        self.path = p
+                        self._content = f.read()
+                        break
+                except FileNotFoundError:
+                    pass
         else:
             raise BootloaderNotFound()