diff --git a/pkgs/applications/openorienteering-mapper/bin.nix b/pkgs/applications/openorienteering-mapper/bin.nix

index 23f9892d8164b8cad1c13fab4673722ac35e6abc..3be05738d21e4e81dba53ba51b4d2e108756e747 100644

--- a/pkgs/applications/openorienteering-mapper/bin.nix

+++ b/pkgs/applications/openorienteering-mapper/bin.nix

@@ -18,6 +18,8 @@ preferLocalBuild = true;

nativeBuildInputs = [ undmg ];

• sourceRoot = "Mapper.app";

installPhase = ''

 mkdir -p $out/Applications/Mapper.app

 cp -R . $out/Applications/Mapper.app