diff --git a/modules/nix.nix b/modules/nix.nix
index 789c9de..d34927e 100644
--- a/modules/nix.nix
+++ b/modules/nix.nix
@@ -9,7 +9,6 @@
   nixpkgs = {
     overlays = [
       (self: super: {
-        bun-baseline = (super.callPackage ../overlays/bun-baseline.nix { });
         mfcl3750cdwlpr = (super.callPackage ../overlays/mfcl3750cdw.nix { }).driver;
         mfcl3750cdwcupswrapper = (super.callPackage ../overlays/mfcl3750cdw.nix { }).cupswrapper;
         pppdf = (super.python3Packages.callPackage ../overlays/pppdf { });
diff --git a/modules/packages.nix b/modules/packages.nix
index e47179a..6275fae 100644
--- a/modules/packages.nix
+++ b/modules/packages.nix
@@ -27,10 +27,10 @@
     # languages
     gcc13
     clang
-    universal-ctags
+    universal-ctags # a maintained ctags implementation
     rustc
-    cargo
-    go
+    cargo # downloads your rust project's dependencies and builds your project
+    go # go programming language
     python312
     python312Packages.ptpython
     python312Packages.ipython
@@ -39,7 +39,6 @@
     openjdk17
     javaPackages.openjfx17
     gradle_7
-    bun-baseline
     nodejs_20
     nodenv
     nodePackages.yarn
diff --git a/overlays/bun-baseline.nix b/overlays/bun-baseline.nix
deleted file mode 100644
index add110f..0000000
--- a/overlays/bun-baseline.nix
+++ /dev/null
@@ -1,68 +0,0 @@
-{ lib
-, stdenvNoCC
-, callPackage
-, fetchurl
-, autoPatchelfHook
-, unzip
-, openssl
-, writeShellScript
-, curl
-, jq
-, common-updater-scripts
-}:
-
-stdenvNoCC.mkDerivation rec {
-  version = "1.0.24";
-  pname = "bun";
-
-  src = passthru.sources.${stdenvNoCC.hostPlatform.system} or (throw "Unsupported system: ${stdenvNoCC.hostPlatform.system}");
-
-  strictDeps = true;
-  nativeBuildInputs = [ unzip ] ++ lib.optionals stdenvNoCC.isLinux [ autoPatchelfHook ];
-  buildInputs = [ openssl ];
-
-  dontConfigure = true;
-  dontBuild = true;
-
-  installPhase = ''
-    runHook preInstall
-    install -Dm 755 ./bun $out/bin/bun
-    runHook postInstall
-  '';
-  passthru = {
-    sources = {
-      "x86_64-linux" = fetchurl {
-        url = "https://github.com/oven-sh/bun/releases/download/bun-v${version}/bun-linux-x64-baseline.zip";
-        sha256 = "be6240720eaf37d761ee80264a5ce2dbfb81c7cea3fea7a4e522fe89cdf8c659";
-      };
-    };
-    updateScript = writeShellScript "update-bun" ''
-      set -o errexit
-      export PATH="${lib.makeBinPath [ curl jq common-updater-scripts ]}"
-      NEW_VERSION=$(curl --silent https://api.github.com/repos/oven-sh/bun/releases/latest | jq '.tag_name | ltrimstr("bun-v")' --raw-output)
-      if [[ "${version}" = "$NEW_VERSION" ]]; then
-          echo "The new version same as the old version."
-          exit 0
-      fi
-      for platform in ${lib.escapeShellArgs meta.platforms}; do
-        update-source-version "bun" "0" "${lib.fakeSha256}" --source-key="sources.$platform"
-        update-source-version "bun" "$NEW_VERSION" --source-key="sources.$platform"
-      done
-    '';
-  };
-  meta = with lib; {
-    homepage = "https://bun.sh";
-    changelog = "https://github.com/Jarred-Sumner/bun/releases/tag/bun-v${version}";
-    description = "Incredibly fast JavaScript runtime, bundler, transpiler and package manager – all in one";
-    sourceProvenance = with sourceTypes; [ binaryNativeCode ];
-    longDescription = ''
-      All in one fast & easy-to-use tool. Instead of 1,000 node_modules for development, you only need bun.
-    '';
-    license = with licenses; [
-      mit # bun core
-      lgpl21Only # javascriptcore and webkit
-    ];
-    maintainers = [ maintainers.bchmnn ];
-    platforms = builtins.attrNames passthru.sources;
-  };
-}
diff --git a/users/gandalf/modules/packages.nix b/users/gandalf/modules/packages.nix
index f937c14..58de193 100644
--- a/users/gandalf/modules/packages.nix
+++ b/users/gandalf/modules/packages.nix
@@ -16,6 +16,7 @@
     ghostscript # postscript interpreter (mainline version)
     ventoy-full # bootable usb solution
     isisdl # downloader for isis of tu-berlin
+    sage # open source mathematics software, free alternative to magma, maple, mathematica, and matlab
   ];
 
 }