diff --git a/dotfiles/starship.toml b/dotfiles/starship.toml
index 383e9c7..3f9a86e 100644
--- a/dotfiles/starship.toml
+++ b/dotfiles/starship.toml
@@ -28,6 +28,3 @@ format = "[$hostname]($style) "
 
 [git_branch]
 format = "[$symbol$branch]($style)"
-
-[character]
-use_symbol_for_status = false
diff --git a/roles/dev.nix b/roles/dev.nix
index d046695..c1cc8ee 100644
--- a/roles/dev.nix
+++ b/roles/dev.nix
@@ -16,6 +16,7 @@ in {
 
     nodePackages.pyright
     (python39.withPackages(python-packages: with python-packages; [
+      black
       pyyaml
       requests
     ]))
diff --git a/roles/mail.nix b/roles/mail.nix
index 403cfd3..8e834c5 100644
--- a/roles/mail.nix
+++ b/roles/mail.nix
@@ -6,7 +6,10 @@ in {
   environment.systemPackages = with pkgs; [
     astroid
     isync
+    khal
     msmtp
     notmuch
+    thunderbird
+    vdirsyncer
   ];
 }