Collect all affected devices

lib/modules/fileSystems.nix

@@ -88,6 +88,11 @@ in
                 )
                 (builtins.attrValues cfg.mounts))
             );
+
+            affected = (builtins.map (_: _.deviceVariable) devices) ++
+              (builtins.concatMap
+                (_: builtins.map (_: lib.escapeShellArg _) _.devices)
+                (builtins.attrValues cfg.btrfs.volumes));
           in
           ''
             #!/bin/bash
@@ -96,14 +101,14 @@ in
             ${lib.strings.concatLines (lib.optionals ((builtins.length devices) > 0) [
               ''echo "$(tput setaf 3)=== WARNING ====$(tput sgr0)"''
               (''echo "Continuing this script will alter the partitions of ''
-                + (lib.strings.concatStringsSep ", " (builtins.map (_: "${_.deviceVariable}") (lib.lists.init devices)))
-                + (if (builtins.length devices) > 1 then " and " else "") + (lib.lists.last devices).deviceVariable + ''"'')
+              + (lib.strings.concatStringsSep ", " (lib.lists.init affected))
+              + (if (builtins.length affected) > 1 then " and " else "") + (lib.lists.last affected) + ''"'')
               ''
                 if ! fish ${./fileSystems/confirm.fish} "Are you sure you want to continue?" "n"; then
                   exit 1
                 fi
               ''
-            ])}
+              ])}
             ${cfg.diskSetup.scripts.partition}
             ${cfg.btrfs.script}
             ${mountScript}