diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,19 @@
 Changelog
 =========
 
+Version 0.2.1.0
+---------------
+
+*October 4, 2026*
+
+<https://github.com/mstksg/dhall-text-shell/releases/tag/v0.2.1.0>
+
+*   Fix build against recent `dhall` releases, where
+    `Dhall.DirectoryTree.toDirectoryTree` gained a leading `Bool` argument
+    for whether to allow path separators in file names.  Added a matching
+    `--allow-path-separators` flag (off by default, mirroring `dhall
+    to-directory-tree`).
+
 Version 0.2.0.0
 ---------------
 
diff --git a/dhall-text-shell.cabal b/dhall-text-shell.cabal
--- a/dhall-text-shell.cabal
+++ b/dhall-text-shell.cabal
@@ -1,6 +1,6 @@
 cabal-version:       2.4
 name:                dhall-text-shell
-version:             0.2.0.0
+version:             0.2.1.0
 synopsis:            Render dhall text with shell commands as function arguments
 description:
     `dhall text` and `dhall to-directory-tree` require the expression (or file
diff --git a/src/Dhall/TextShell.hs b/src/Dhall/TextShell.hs
--- a/src/Dhall/TextShell.hs
+++ b/src/Dhall/TextShell.hs
@@ -45,6 +45,7 @@
     { file    :: Input
     , output  :: Output
     , asDirectoryTree :: Bool
+    , allowPathSeparators :: Bool
     , argCmds :: [String]
     }
 
@@ -62,6 +63,7 @@
       Options   <$> parseFile
                 <*> parseOutput
                 <*> parseAsDirectoryTree
+                <*> parseAllowPathSeparators
                 <*> Options.Applicative.many parseArgCmd
     parseFile = fmap f (optional p)
       where
@@ -87,6 +89,8 @@
                 )
     parseAsDirectoryTree = switch "directory-tree"
         "Create a directory tree a la dhall to-directory-tree instead of a single file"
+    parseAllowPathSeparators = switch "allow-path-separators"
+        "Whether to allow path separators in file names"
     parseArgCmd = Options.Applicative.strOption
             (   Options.Applicative.long "argCmd"
             <>  Options.Applicative.help "Use shell command to supply as `Text -> Text` argument"
@@ -179,7 +183,7 @@
           True -> case output of
             StandardOutput -> Control.Exception.throwIO  $
               System.IO.Error.userError "Usage of --directory-tree requires --output to be specified"
-            OutputFile file_ -> DirectoryTree.toDirectoryTree file_ res
+            OutputFile file_ -> DirectoryTree.toDirectoryTree allowPathSeparators file_ res
 
 -- | Copy as much as possible the setup in "Dhall.Main".  If that module
 -- changes, this should update as well.