adding the usual suspects emulator plugins

packages/the-usual-suspects/ostirus/ostirus.nix

@@ -0,0 +1,37 @@
+{ stdenv, pkgs, fetchurl, lib, unzip, autoPatchelfHook, makeWrapper, ... }:
+
+stdenv.mkDerivation rec {
+  pname = "ostirus";
+  version = "latest";
+  src = fetchurl {
+    url = "https://futurenoize.com/dsp56300/builds/ostirus/beta/DSP56300Emu-1.4.0-Linux_x86_64-OsTIrus-CLAP.zip";
+    sha256 = "sha256-F+n/0gtJ0U7pF7KWr0EQbDSW1oGlG0az17l5zlE3H0s=";
+  };
+  nativeBuildInputs = [ makeWrapper unzip autoPatchelfHook ];
+  buildInputs = with pkgs; [
+    freetype
+    fontconfig
+    alsa-lib
+    pipewire
+    stdenv.cc.cc.lib
+  ];
+
+  unpackPhase = ''
+    unzip $src
+  '';
+
+  installPhase = ''
+    mkdir -p $out/lib/clap
+    cp -r usr/local/lib/clap/OsTIrus.clap $out/lib/clap/
+  '';
+
+  postFixup = ''
+    patchelf --set-rpath "${lib.makeLibraryPath buildInputs}" $out/lib/clap/OsTIrus.clap
+  '';
+
+  meta = with lib; {
+    homepage = "https://dsp56300.wordpress.com/ostirus/";
+    description = "OsTIrus";
+    platforms = platforms.linux;
+  };
+}