diff --git a/byg/src/DependencyGenerator.hs b/byg/src/DependencyGenerator.hs
index d29c429..7c9ef6e 100644
--- a/byg/src/DependencyGenerator.hs
+++ b/byg/src/DependencyGenerator.hs
@@ -111,8 +111,10 @@ convertImage = runFunctionIO ConvertImage
 saveFile :: Token (String, FilePath) -> DepGenM ()
 saveFile = runFunctionIO SaveFile
 
-makeDir :: Token FilePath -> DepGenM ()
-makeDir = runFunctionIO MakeDir
+makeDir :: Token FilePath -> DepGenM' ()
+makeDir input = do
+  _ <- runFunctionIO MakeDir input
+  pure ()
 
 runPandoc :: Token (FilePath, FilePath) -> DepGenM ()
 runPandoc = runFunctionIO RunPandoc