diff --git a/home/emacs.nix b/home/emacs.nix
index 73911b2..80ac8e1 100644
--- a/home/emacs.nix
+++ b/home/emacs.nix
@@ -11,6 +11,7 @@ in {
   # accessible from the global namespace.
   home.packages = with pkgs; [
     emacs
+    python3
     enchant # spell checking
     ripgrep # for Emacs' ripgrep integration
     libvterm-neovim # vterm support for Emacs
@@ -32,6 +33,7 @@ in {
       tree-sitter-zig
       tree-sitter-elisp
       tree-sitter-markdown
+      pkgs.tree-sitter-slang
     ]))
   ];
   # xdg.configFile = {
diff --git a/pkgs/dotfiles.nix b/pkgs/dotfiles.nix
index e00603f..82e278c 100644
--- a/pkgs/dotfiles.nix
+++ b/pkgs/dotfiles.nix
@@ -5,6 +5,7 @@
   src = builtins.fetchGit {
     url = "git@git.nirgendwo.xyz:janis/dotfiles.git";
     rev = "1af2254ee4d278305d9a8b9d6eb28a4bfc79162c";
+    ref = "main";
   };
 
   dontConfigure = true;
diff --git a/pkgs/overlay.nix b/pkgs/overlay.nix
index d6448ec..3594a34 100644
--- a/pkgs/overlay.nix
+++ b/pkgs/overlay.nix
@@ -3,4 +3,5 @@ final: prev: {
   nordvpn-rofi = prev.callPackage ./nordvpn-rofi.nix {};
   screenshot = prev.callPackage ./screenshot.nix {};
   dotfiles = prev.callPackage ./dotfiles.nix {};
+  tree-sitter-slang  = prev.callPackage ./tree-sitter-slang.nix {};
 }
diff --git a/pkgs/tree-sitter-slang.nix b/pkgs/tree-sitter-slang.nix
new file mode 100644
index 0000000..636d76b
--- /dev/null
+++ b/pkgs/tree-sitter-slang.nix
@@ -0,0 +1,10 @@
+{pkgs, fetchFromGitHub, tree-sitter, ...}: tree-sitter.buildGrammar {
+  language = "slang";
+  version = "0.1.0";
+  src = fetchFromGitHub {
+    owner = "tree-sitter-grammars";
+    repo = "tree-sitter-slang";
+    rev = "5b0adf65710c3a7c265f0451ed6b4789410cbe63";
+    hash = "sha256-uFU8hdz6APzrc9JUib47cmBd5kSnbSh0CbSqSbEfkoc=";
+  };
+}