diff --git a/lib/modules/fileSystems.nix b/lib/modules/fileSystems.nix
index ab2e0c84..1b54ed7c 100644
--- a/lib/modules/fileSystems.nix
+++ b/lib/modules/fileSystems.nix
@@ -67,6 +67,7 @@ in
       fileSystems = {
         script =
           let
+            inherit (lib.strings) normalizePath removeSuffix;
             devices = (builtins.attrValues cfg.diskSetup.devices);
             mountScript = lib.strings.concatLines (
               (builtins.concatMap
@@ -80,7 +81,7 @@ in
                       [
                         (builtins.concatStringsSep " " (builtins.map (_: "-o ${_}") _.options))
                         (_.device)
-                        (lib.strings.normalizePath "/${cfg.diskSetup.rootDir}/${_.mountPoint}")
+                        (removeSuffix "/" (normalizePath "/${cfg.rootDir}/${_.mountPoint}"))
                       ]
                     ))
                   ]