freetube: fix icon

pkgs/applications/video/freetube/default.nix

@@ -23,11 +23,11 @@ stdenv.mkDerivation rec {
   installPhase = ''
     runHook preInstall
 
-    mkdir -p $out/bin $out/share/${pname} $out/share/applications
+    mkdir -p $out/bin $out/share/${pname} $out/share/applications $out/share/icons/hicolor/scalable/apps
 
     cp -a ${appimageContents}/{locales,resources} $out/share/${pname}
     cp -a ${appimageContents}/freetube.desktop $out/share/applications/${pname}.desktop
-    cp -a ${appimageContents}/usr/share/icons $out/share
+    cp -a ${appimageContents}/usr/share/icons/hicolor/scalable/freetube.svg $out/share/icons/hicolor/scalable/apps
 
     substituteInPlace $out/share/applications/${pname}.desktop \
       --replace 'Exec=AppRun' 'Exec=${pname}'