beeper: fix desktop entry copy

pkgs/by-name/be/beeper/package.nix

@@ -27,12 +27,12 @@ appimageTools.wrapType2 {
     # disable creating a desktop file and icon in the home folder during runtime
     linuxConfigFilename=$out/resources/app/build/main/linux-*.mjs
     echo "export function registerLinuxConfig() {}" > $linuxConfigFilename
-    substituteInPlace $out/beepertexts.desktop --replace-fail "AppRun" "beeper"
   '';
 
   extraInstallCommands = ''
     install -Dm 644 ${appimageContents}/beepertexts.png $out/share/icons/hicolor/512x512/apps/beepertexts.png
     install -Dm 644 ${appimageContents}/beepertexts.desktop -t $out/share/applications/
+    substituteInPlace $out/share/applications/beepertexts.desktop --replace-fail "AppRun" "beeper"
 
     . ${makeWrapper}/nix-support/setup-hook
     wrapProgram $out/bin/beeper \