diff --git a/pkgs/applications/audio/alsa-scarlett-gui/default.nix b/pkgs/applications/audio/alsa-scarlett-gui/default.nix
index 9740c2f71861..0ce5bd359e76 100644
--- a/pkgs/applications/audio/alsa-scarlett-gui/default.nix
+++ b/pkgs/applications/audio/alsa-scarlett-gui/default.nix
@@ -25,8 +25,8 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkg-config wrapGAppsHook4 ];
   buildInputs = [ gtk4 alsa-lib ];
   postInstall = ''
-      substituteInPlace $out/share/applications/vu.b4.${pname}.desktop \
-        --replace "Exec=/bin/alsa-scarlett-gui" "Exec=$out/bin/${pname}"
+    substituteInPlace $out/share/applications/vu.b4.alsa-scarlett-gui.desktop \
+      --replace "Exec=/bin/alsa-scarlett-gui" "Exec=$out/bin/alsa-scarlett-gui"
   '';
 
   # causes redefinition of _FORTIFY_SOURCE