diff --git a/modules/derivations/antlr.nix b/modules/derivations/antlr.nix
new file mode 100644
index 0000000..c0c1aff
--- /dev/null
+++ b/modules/derivations/antlr.nix
@@ -0,0 +1,28 @@
+{
+  pkgs ? import <nixpkgs> {},
+  version ? "3.5.3",
+  hash ? "sha256-JMlDvaNRC/qEnD6uEts32kh9IEU2/wgHTsHz3Z3fq0M=",
+  jre ? pkgs.jre,
+  ...
+}:
+pkgs.stdenv.mkDerivation {
+  pname = "antlr";
+  inherit version;
+
+  dontUnpack = true;
+  src = pkgs.fetchurl {
+    url = "https://github.com/antlr/website-antlr3/blob/gh-pages/download/antlr-${version}-complete.jar";
+    inherit hash;
+  };
+
+  installPhase = ''
+    mkdir -p $out/share/java
+    cp $src $out/share/java/antlr-${version}-complete.jar
+    mkdir $out/bin
+    cat > $out/bin/antlr <<EOF
+    #!/bin/sh
+    exec ${jre}/bin/java -jar $out/share/java/antlr-${version}-complete.jar "$@"
+    EOF
+    chmod +x $out/bin/antlr
+  '';
+}
diff --git a/modules/programs.nix b/modules/programs.nix
index dcb2656..99564c0 100644
--- a/modules/programs.nix
+++ b/modules/programs.nix
@@ -1,4 +1,8 @@
 {pkgs, ...}: let
+  antlr-works =
+    import
+    ./derivations/antlr.nix
+    {inherit pkgs;};
   RStudio-with-my-packages =
     pkgs.rstudioWrapper.override
     {
@@ -13,43 +17,44 @@
       ];
     };
 in {
-  environment.systemPackages = with pkgs; [
-    age
-    alejandra
-    arduino
-    borgbackup
-    borgmatic
-    chromium
-    discord
-    docker
-    docker-compose
-    drawio
-    ffmpeg
-    firefox
-    gimp
-    git
-    insomnia
-    kicad
-    krita
-    libreoffice
-    lutris
-    mosquitto
-    mupdf
-    nix-index
-    nix-output-monitor
-    obsidian
-    openhantek6022
-    qalculate-qt
-    qtpass
-    ranger
+  environment.systemPackages = [
     RStudio-with-my-packages
-    sops
-    spotify
-    unstable.nh
-    vim
-    vscode
-    wget
-    zoom
+    antlr-works
+    pkgs.age
+    pkgs.alejandra
+    pkgs.arduino
+    pkgs.borgbackup
+    pkgs.borgmatic
+    pkgs.chromium
+    pkgs.discord
+    pkgs.docker
+    pkgs.docker-compose
+    pkgs.drawio
+    pkgs.ffmpeg
+    pkgs.firefox
+    pkgs.gimp
+    pkgs.git
+    pkgs.insomnia
+    pkgs.kicad
+    pkgs.krita
+    pkgs.libreoffice
+    pkgs.lutris
+    pkgs.mosquitto
+    pkgs.mupdf
+    pkgs.nix-index
+    pkgs.nix-output-monitor
+    pkgs.obsidian
+    pkgs.openhantek6022
+    pkgs.qalculate-qt
+    pkgs.qtpass
+    pkgs.ranger
+    pkgs.sops
+    pkgs.spotify
+    pkgs.unstable.nh
+    pkgs.vim
+    pkgs.vscode
+    pkgs.wget
+    pkgs.zoom
   ];
   nixpkgs.config.permittedInsecurePackages = [
     "electron-25.9.0" # required by obsidian