diff --git a/flake.nix b/flake.nix
index 3e4ec6f..6be94bb 100644
--- a/flake.nix
+++ b/flake.nix
@@ -29,7 +29,11 @@
             picocom
             (python3.withPackages (py-pkgs: [
               py-pkgs.invoke
+              py-pkgs.distutils
+              py-pkgs.xdot
             ]))
+            svlint
+            svls
             symbiyosys
             trellis
             verilator