diff --git a/README.md b/README.md
index 6ad0daa..8f91b9d 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@
 
 ## Pushing systems to the binary cache
 
-`nix path-info -r .#nixosConfigurations.<hostname>.config.system.build.toplevel | attic push <your-attic-cache-name>`
+`nix path-info -r .#nixosConfigurations.<hostname>.config.system.build.toplevel | attic push <your-attic-cache-name> --stdin`
 
 ## Deploying to the remote