diff --git a/Readme.md b/Readme.md
index 2c64af9..96da8af 100644
--- a/Readme.md
+++ b/Readme.md
@@ -1,6 +1,9 @@
 # Sheet Organizer
 A simple tool for organizing and opening digital sheet music on a touch display as part of a digital music stand.
 
+## Dependencies
+This tool offers editing pdf using [Xournal++](https://github.com/xournalpp/xournalpp).
+
 ## Configuration
 You can configure sheet-organizer using an file `config.toml` inside one of your `$XDG_CONFIG_DIRECTORIES` (e.g. `~/.config/sheet-organizer/config.toml`).
 
diff --git a/flake.nix b/flake.nix
index f08457c..eb802f7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -52,7 +52,6 @@
               with pkgs;
               [
                 gtk4
-                xournalpp # not needed for building
               ]
               ++ pkgs.lib.optionals pkgs.stdenv.isDarwin [
                 # Additional darwin specific inputs can be set here