diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index 48fd5289..9f6ee1df 100644
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -159,6 +159,7 @@ in
     pommed_light
     rofi
     rofi-pass
+    skippy-xd
     synergy
     udiskie-appindicator
     volnoti
@@ -203,6 +204,7 @@ in
     silver-searcher
     stow
     tmux
+    valgrind
     wget
     wmctrl
     zsh
diff --git a/nixos/extra.nix b/nixos/extra.nix
index fce0f709..a0c3412f 100644
--- a/nixos/extra.nix
+++ b/nixos/extra.nix
@@ -3,6 +3,7 @@
   environment.systemPackages = with pkgs; [
     gimp
     texlive.combined.scheme-full
+    slack
   ];
   boot.extraModulePackages = with pkgs; [ xboxdrv ];
 }