diff --git a/roles/dev.nix b/roles/dev.nix
index 38bd76c..1b7b2ac 100644
--- a/roles/dev.nix
+++ b/roles/dev.nix
@@ -3,20 +3,24 @@
 let
   unstable = import <nixos-unstable> {};
 in {
+
   environment.systemPackages = with pkgs; [
     gnumake
     go
-    python38
-    python38Packages.pyls-black
-    python38Packages.pyls-isort
-    python38Packages.pyls-mypy
-    python38Packages.python-language-server
-    python38Packages.requests
     rustup
     unstable.golangci-lint
     unstable.gopls
     unstable.rust-analyzer
 
+    (python38.withPackages(python-packages: with python-packages; [
+      pyls-black
+      pyls-isort
+      pyls-mypy
+      python-language-server
+      pyyaml
+      requests
+    ]))
+
     emacs
     ltrace
     sops