diff --git a/modules/packages/default.nix b/modules/packages/default.nix
index 41e6909c..3693f5a0 100644
--- a/modules/packages/default.nix
+++ b/modules/packages/default.nix
@@ -224,7 +224,7 @@ inputs:
             nix-template appimage-run nil nixd nix-alien nix-serve node2nix nix-prefetch-github prefetch-npm-deps
             nix-prefetch-docker pnpm-lock-export
             # instant messager
-            zoom-us signal-desktop qq nur-xddxdd.wechat-uos # jail
+            zoom-us signal-desktop qq nur-xddxdd.wechat-uos slack # jail
             # office
             libreoffice-qt texlive.combined.scheme-full texstudio poppler_utils pdftk gnuplot pdfchain
             # development
diff --git a/modules/system/default.nix b/modules/system/default.nix
index dbda92c7..b1a63f49 100644
--- a/modules/system/default.nix
+++ b/modules/system/default.nix
@@ -55,6 +55,7 @@ inputs:
       XCOMPOSECACHE = "${XDG_CACHE_HOME}/X11/xcompose";
       MATHEMATICA_USERBASE = "${XDG_CONFIG_HOME}/mathematica";
       _JAVA_OPTIONS = "-Djava.util.prefs.userRoot=${XDG_CONFIG_HOME}/java";
+      NIXOS_OZONE_WL = "1";
     };
     i18n =
     {