diff --git a/flake.nix b/flake.nix
index 3b514e0..a38127b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -292,10 +292,12 @@
               inherit device subvolumes;
             })
             ({ lib, ... }: {
-              fileSystems."${mountDir}" = lib.mkForce {
-                inherit device;
-                fsType = "btrfs";
-                options = [ "defaults" "compress=zstd" "rw" "loop" ];
+              fileSystems = lib.mkForce {
+                "${mountDir}" = {
+                  inherit device;
+                  fsType = "btrfs";
+                  options = [ "defaults" "compress=zstd" "rw" "loop" ];
+                };
               };
             })
           ];
@@ -466,10 +468,12 @@
                   '';
                 };
 
-                fileSystems."${mountDir}" = lib.mkForce {
-                  inherit device;
-                  fsType = "btrfs";
-                  options = [ "defaults" "compress=zstd" "rw" ];
+                fileSystems = lib.mkForce {
+                  "${mountDir}" = {
+                    inherit device;
+                    fsType = "btrfs";
+                    options = [ "defaults" "compress=zstd" "rw" ];
+                  };
                 };
               })
           ];