diff --git a/lib/modules/partition/disks.nix b/lib/modules/partition/disks.nix
index 6a4dbc02..42eb7928 100644
--- a/lib/modules/partition/disks.nix
+++ b/lib/modules/partition/disks.nix
@@ -142,7 +142,7 @@
                   ];
 
                   fallback = ''
-                    if ! { ls "${diskVar}"?(p)${toString index} 2>&1; } > /dev/null
+                    if ! { ls "${partVar}" 2>&1; } > /dev/null
                     then
                       ${create}
                     fi