diff --git a/src/Roux/Server.hs b/src/Roux/Server.hs
index 1e2827b..05e74ba 100644
--- a/src/Roux/Server.hs
+++ b/src/Roux/Server.hs
@@ -479,7 +479,7 @@ findConvertScript = do
     mPath <- findExecutable "convert-to-cooklang"
     case mPath of
         Just p -> pure p
-        Nothing -> pure "scripts/convert-to-cooklang"
+        Nothing -> makeAbsolute "scripts/convert-to-cooklang"
 
 -- | Write a temporary YAML config for the subprocess.
 writeConvertConfig :: FilePath -> AnthropicConfig -> IO ()