diff --git a/pkgs/by-name/sg/sg-323/package.nix b/pkgs/by-name/sg/sg-323/package.nix
new file mode 100644
index 000000000000..23c9dbc9dee2
--- /dev/null
+++ b/pkgs/by-name/sg/sg-323/package.nix
@@ -0,0 +1,101 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  cmake,
+  pkg-config,
+  alsa-lib,
+  fontconfig,
+  freetype,
+  libX11,
+  libXcomposite,
+  libXcursor,
+  libXdmcp,
+  libXext,
+  libXinerama,
+  libXrandr,
+  libXtst,
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "SG-323";
+  version = "1.0.1";
+
+  src = fetchFromGitHub {
+    owner = "greyboxaudio";
+    repo = "SG-323";
+    tag = finalAttrs.version;
+    fetchSubmodules = true;
+    hash = "sha256-DvA9Y7eAG0pWLmHEZmJlo0JLU+0B4c8rlkX1bbVcnL8=";
+  };
+
+  nativeBuildInputs = [
+    cmake
+    pkg-config
+  ];
+
+  buildInputs = [
+    fontconfig
+    freetype
+  ]
+  ++ lib.optionals stdenv.isLinux [
+    alsa-lib
+    libX11
+    libXcomposite
+    libXcursor
+    libXdmcp
+    libXext
+    libXinerama
+    libXrandr
+    libXtst
+  ];
+
+  enableParallelBuilding = true;
+
+  postPatch = ''
+    substituteInPlace CMakeLists.txt \
+      --replace-fail 'juce::juce_recommended_lto_flags' '# Not forcing LTO'
+  '';
+
+  installPhase =
+    let
+      vst3Dir =
+        if stdenv.hostPlatform.isDarwin then "$out/Library/Audio/Plug-Ins/VST3" else "$out/lib/vst3";
+      # this one's a guess, don't know where ppl have agreed to put them yet
+      clapDir =
+        if stdenv.hostPlatform.isDarwin then "$out/Library/Audio/Plug-Ins/CLAP" else "$out/lib/clap";
+      auDir = "$out/Library/Audio/Plug-Ins/Components";
+    in
+    ''
+      runHook preInstall
+
+    ''
+    + (
+      if stdenv.hostPlatform.isDarwin then
+        ''
+          mkdir -p ${auDir}
+          cp -r "SG323_artefacts/Release/AU/SG-323.component" ${auDir}
+        ''
+      else
+        ''
+          mkdir -p $out/lib/lv2
+          cp -r "SG323_artefacts/Release/LV2/SG-323.lv2" $out/lib/lv2
+        ''
+    )
+    + ''
+      mkdir -p ${vst3Dir} ${clapDir}
+      mv SG323_artefacts/Release/VST3/* ${vst3Dir}
+      mv SG323_artefacts/Release/CLAP/* ${clapDir}
+
+      runHook postInstall
+    '';
+
+  meta = {
+    description = "Ursa Major Stargate 323 reverb plugin";
+    homepage = "https://github.com/greyboxaudio/SG-323";
+    changelog = "https://github.com/greyboxaudio/SG-323/releases/tag/v${finalAttrs.version}";
+    license = lib.licenses.gpl3Plus;
+    maintainers = with lib.maintainers; [ magnetophon ];
+    platforms = lib.platforms.all;
+  };
+})