copy bitwig.jar to install location and updated .gitignore

home/packages/media/bitwig.nix

@@ -1,4 +1,6 @@
-{pkgs, ...}: {
+{pkgs, ...}: let
+  customJar = /etc/nixos/home/packages/media/bitwig.jar;
+in {
   users.users.someone.packages = with pkgs; [
     (bitwig-studio6.overrideAttrs (old: {
       version = "6.0";
@@ -7,6 +9,10 @@
         url = "https://www.bitwig.com/dl/Bitwig%20Studio/6.0/installer_linux";
         hash = "sha256-jrCTgaxfeWhfKwLeKLmqTQWS7RVbVnHqJ0InCipmm8k=";
       };
+
+      postInstall = ''
+        cp ${customJar} $out/libexec/bin/bitwig.jar
+      '';
     }))
   ];
 }