diff --git a/.github/workflows/example-livemedia-creator.yml b/.github/workflows/example-livemedia-creator.yml
index bfdf612b2..53af027c5 100644
--- a/.github/workflows/example-livemedia-creator.yml
+++ b/.github/workflows/example-livemedia-creator.yml
@@ -44,14 +44,12 @@ jobs:
       ## Create the ISO
       - name: Create the custom ISO
           # --no-virt: Needed since we're in a container, no host CPU
-          # --squashfs-only: Just to speed things up, not required
         run: |
           livemedia-creator \
             --ks "${{ inputs.kickstart_path }}" \
             --no-virt \
             --make-iso \
             --iso-only \
-            --squashfs-only \
             --iso-name Fedora-custom-example.iso \
             --project Fedora \
             --volid "Fedora-${{ inputs.fedora_release }}" \
diff --git a/src/pylorax/cmdline.py b/src/pylorax/cmdline.py
index 343e9f273..866406894 100644
--- a/src/pylorax/cmdline.py
+++ b/src/pylorax/cmdline.py
@@ -26,6 +26,19 @@
 
 version = "{0}-{1}".format(os.path.basename(sys.argv[0]), vernum)
 
+class NullAction(argparse.Action):
+    """
+    An argparse Action which does nothing. Used to accept but
+    ignore the old --squashfs-only argument.
+    """
+    def __init__(self, *args, **kwargs):
+        """Minimal required to let the arg have no value."""
+        super().__init__(*args, **kwargs, nargs=0, default=None, required=False)
+    def __call__(self, *args, **kwargs):
+        """Do nothing."""
+        pass
+
+
 def lorax_parser(dracut_default=""):
     """ Return the ArgumentParser for lorax"""
 
@@ -109,9 +122,8 @@ def lorax_parser(dracut_default=""):
                           help="Do not verify SSL certificates")
     optional.add_argument("--dnfplugin", action="append", default=[], dest="dnfplugins",
                           help="Enable a DNF plugin by name/glob, or * to enable all of them.")
-    optional.add_argument("--squashfs-only", action="store_const", const="squashfs",
-                          default="squashfs", dest="rootfs_type",
-                          help="Use a plain squashfs filesystem for the runtime.")
+    optional.add_argument("--squashfs-only", action=NullAction,
+                          help="Ignored, provided for backward compatibility.")
     optional.add_argument("--skip-branding", action="store_true", default=False,
                           help="Disable automatic branding package selection. Use --installpkgs to add custom branding.")
     optional.add_argument("--rootfs-type", metavar="ROOTFSTYPE", default="squashfs",
@@ -328,8 +340,8 @@ def lmc_parser(dracut_default=""):
     parser.add_argument("--releasever", default=DEFAULT_RELEASEVER,
                         help="substituted for @VERSION@ in bootloader config files")
     parser.add_argument("--volid", default=None, help="volume id")
-    parser.add_argument("--squashfs-only", action="store_const", const="squashfs",
-                        dest="rootfs_type",
+    parser.add_argument("--squashfs-only", action=NullAction,
+                          help="Ignored, provided for backward compatibility.")
                         help="Use a plain squashfs filesystem for the runtime.")
     parser.add_argument("--rootfs-type", metavar="ROOTFSTYPE", default="squashfs",
                         help="Type of rootfs: %s" % ",".join(ROOTFSTYPES))