diff --git a/pkgs/default.nix b/pkgs/default.nix
index a9fe6d2..19f2434 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -10,15 +10,22 @@ self: super:
       "term" # Disable ligature/ligation
     ];
   in
-  super.iosevka.override {
-    nodejs = super.nodejs-8_x;
-    design = tags;
-    set = "PPStyle";
-  };
+    super.iosevka.override {
+      nodejs = super.nodejs-8_x;
+      design = tags;
+      set = "PPStyle";
+    };
+
   vim-samae = super.callPackage ./vim {};
 
+  reaper-samae = super.callPackage ./reaper {};
+
   # Bug fixes:
-  kitty07 = super.callPackage ./kitty {};
+  # VCVRack has a bug when used with Xmonad that makes the UI
+  # crash almost immediately There's a workaround documented here
+  # (https://github.com/VCVRack/Rack/issues/478#issuecomment-456174702) and it
+  # requires applying a patch on the source before building.
+  vcv-rack-xmonad = super.callPackage ./vcv-rack {};
 
   scientifica-font = super.callPackage ./scientifica-font {};
   curie-font = super.callPackage ./curie-font {};
@@ -26,21 +33,7 @@ self: super:
   ripmime = super.ripmime.override {
     stdenv = super.overrideCC super.stdenv super.gcc6;
   };
-  spotify = super.spotify.overrideDerivation (
-  old: {
-    src = super.fetchurl {
-      url = "https://repository-origin.spotify.com/pool/non-free/s/spotify-client/spotify-client_1.0.77.338.g758ebd78-41_amd64.deb";
-      sha256 = "1971jc0431pl8yixpl37ryl2l0pqdf0xjvkg59nqdwj3vbdx5606";
-    };
-  });
-  # Probably not needed anymore
-  #nixops = super.nixops.overrideDerivation (
-  #old: {
-  #  patchPhase = ''
-  #      substituteInPlace nix/eval-machine-info.nix \
-  #          --replace 'system.nixosVersion' 'system.nixos.version'
-  #  '';
-  #});
+
   # Originally from Mats Rauhala ®2018
   copy = super.writeScriptBin "copy" ''
     function clean() {
diff --git a/pkgs/kitty/default.nix b/pkgs/kitty/default.nix
deleted file mode 100755
index ad074de..0000000
--- a/pkgs/kitty/default.nix
+++ /dev/null
@@ -1,45 +0,0 @@
-{ stdenv, fetchFromGitHub, pkgs, python3Packages, glfw, libunistring, harfbuzz, fontconfig, zlib, pkgconfig, ncurses, imagemagick, makeWrapper, xsel, libstartup_notification, libX11, libXrandr, libXinerama, libXcursor, libxkbcommon, libXi, libXext }:
-
-with python3Packages;
-buildPythonApplication rec {
-  version = "0.7.0";
-  name = "kitty-${version}";
-  format = "other";
-
-  src = fetchFromGitHub {
-    owner = "kovidgoyal";
-    repo = "kitty";
-    rev = "v${version}";
-    sha256 = "0x92w30caym042bmln6nw6f3v764sg06c2kb9hrwpmh6nhlxcs90";
-  };
-
-  buildInputs = [ fontconfig glfw ncurses libunistring harfbuzz libX11 libXrandr libXinerama libXcursor libxkbcommon libXi libXext ];
-
-  nativeBuildInputs = [ pkgconfig ];
-
-  postPatch = ''
-    substituteInPlace kitty/utils.py \
-      --replace "find_library('startup-notification-1')" "'${libstartup_notification}/lib/libstartup-notification-1.so'"
-    '';
-
-  buildPhase = ''
-    python3 setup.py linux-package
-  '';
-
-  installPhase = ''
-    runHook preInstall
-    mkdir -p $out
-    cp -r linux-package/{bin,share,lib} $out
-    wrapProgram "$out/bin/kitty" --prefix PATH : "$out/bin:${stdenv.lib.makeBinPath [ imagemagick xsel ]}"
-    runHook postInstall
-  '';
-
-  meta = with stdenv.lib; {
-    homepage = https://github.com/kovidgoyal/kitty;
-    description = "A modern, hackable, featureful, OpenGL based terminal emulator";
-    license = licenses.gpl3;
-    platforms = platforms.linux;
-    maintainers = with maintainers; [ tex ];
-  };
-}
-
diff --git a/pkgs/kitty/harfbuzz.nix b/pkgs/kitty/harfbuzz.nix
deleted file mode 100755
index f5756d1..0000000
--- a/pkgs/kitty/harfbuzz.nix
+++ /dev/null
@@ -1,56 +0,0 @@
-{ stdenv, fetchurl, pkgconfig, glib, freetype, cairo, libintlOrEmpty
-, icu, graphite2, harfbuzz # The icu variant uses and propagates the non-icu one.
-, withIcu ? false # recommended by upstream as default, but most don't needed and it's big
-, withGraphite2 ? true # it is small and major distros do include it
-}:
-
-let
-  version = "1.5.1";
-  inherit (stdenv.lib) optional optionals optionalString;
-in
-
-stdenv.mkDerivation {
-  name = "harfbuzz${optionalString withIcu "-icu"}-${version}";
-
-  src = fetchurl {
-    url = "http://www.freedesktop.org/software/harfbuzz/release/harfbuzz-${version}.tar.bz2";
-    sha256 = "56838dfdad2729b8866763c82d623354d138a4d99d9ffb710c7d377b5cfc7c51";
-  };
-
-  outputs = [ "out" "dev" ];
-  outputBin = "dev";
-
-  configureFlags = [
-    ( "--with-graphite2=" + (if withGraphite2 then "yes" else "no") ) # not auto-detected by default
-    ( "--with-icu=" +       (if withIcu       then "yes" else "no") )
-  ];
-
-  nativeBuildInputs = [ pkgconfig ];
-  buildInputs = [ glib freetype cairo ] # recommended by upstream
-    ++ libintlOrEmpty;
-  propagatedBuildInputs = []
-    ++ optional withGraphite2 graphite2
-    ++ optionals withIcu [ icu harfbuzz ]
-    ;
-
-  # Slightly hacky; some pkgs expect them in a single directory.
-  postInstall = optionalString withIcu ''
-    rm "$out"/lib/libharfbuzz.* "$dev/lib/pkgconfig/harfbuzz.pc"
-    ln -s {'${harfbuzz.out}',"$out"}/lib/libharfbuzz.la
-    ln -s {'${harfbuzz.dev}',"$dev"}/lib/pkgconfig/harfbuzz.pc
-    ${optionalString stdenv.isDarwin ''
-      ln -s {'${harfbuzz.out}',"$out"}/lib/libharfbuzz.dylib
-      ln -s {'${harfbuzz.out}',"$out"}/lib/libharfbuzz.0.dylib
-    ''}
-  '';
-
-  meta = with stdenv.lib; {
-    description = "An OpenType text shaping engine";
-    homepage = http://www.freedesktop.org/wiki/Software/HarfBuzz;
-    downloadPage = "https://www.freedesktop.org/software/harfbuzz/release/";
-    maintainers = [ maintainers.eelco ];
-    platforms = with platforms; linux ++ darwin;
-    inherit version;
-    updateWalker = true;
-  };
-}
diff --git a/pkgs/reaper/default.nix b/pkgs/reaper/default.nix
new file mode 100644
index 0000000..88df4fb
--- /dev/null
+++ b/pkgs/reaper/default.nix
@@ -0,0 +1,59 @@
+{ stdenv, fetchurl, autoPatchelfHook, makeWrapper
+, alsaLib, xorg
+, gnome3, gtk3, pango, gdk_pixbuf, cairo, glib, freetype
+, libpulseaudio, xdg_utils
+}:
+
+stdenv.mkDerivation rec {
+  name = "reaper-${version}";
+  version = "5.978";
+
+  src = fetchurl {
+    url = "https://www.reaper.fm/files/${stdenv.lib.versions.major version}.x/reaper${builtins.replaceStrings ["."] [""] version}_linux_x86_64.tar.xz";
+    sha256 = "0na7364zxxcic5mq4vaaj4va0g6rhwnwn9fg5gb421iba29ylmhg";
+  };
+
+  nativeBuildInputs = [ autoPatchelfHook makeWrapper ];
+
+  buildInputs = [
+    alsaLib
+
+    xorg.libX11
+    xorg.libXi
+
+    gdk_pixbuf
+    pango
+    cairo
+    glib
+    freetype
+
+    xdg_utils
+  ];
+
+  runtimeDependencies = [
+    gtk3
+  ];
+
+  dontBuild = true;
+
+  installPhase = ''
+    XDG_DATA_HOME="$out/share" ./install-reaper.sh \
+      --install $out/opt \
+      --integrate-user-desktop
+    rm $out/opt/REAPER/uninstall-reaper.sh
+
+    wrapProgram $out/opt/REAPER/reaper \
+      --prefix LD_LIBRARY_PATH : ${libpulseaudio}/lib
+
+    mkdir $out/bin
+    ln -s $out/opt/REAPER/reaper $out/bin/
+    ln -s $out/opt/REAPER/reamote-server $out/bin/
+  '';
+
+  meta = with stdenv.lib; {
+    description = "Digital audio workstation";
+    homepage = https://www.reaper.fm/;
+    license = licenses.unfree;
+    platforms = [ "x86_64-linux" ];
+  };
+}
diff --git a/pkgs/vcv-rack/default.nix b/pkgs/vcv-rack/default.nix
new file mode 100644
index 0000000..d2baa66
--- /dev/null
+++ b/pkgs/vcv-rack/default.nix
@@ -0,0 +1,101 @@
+{ stdenv, makeWrapper, fetchFromBitbucket, fetchFromGitHub, pkgconfig
+, alsaLib, curl, glew, glfw, gtk2-x11, jansson, libjack2, libXext, libXi
+, libzip, rtaudio, rtmidi, speex, writeText }:
+
+let
+  glfw-git = glfw.overrideAttrs (oldAttrs: rec {
+    name = "glfw-git-${version}";
+    version = "unstable-2018-05-29";
+    src = fetchFromGitHub {
+      owner = "glfw";
+      repo = "glfw";
+      rev = "0be4f3f75aebd9d24583ee86590a38e741db0904";
+      sha256 = "0zbcjgc7ks25yi949k0wjknfl00a4dqmz45mhp00k62vlq2sj0i5";
+    };
+    buildInputs = oldAttrs.buildInputs ++ [ libXext libXi ];
+  });
+  pfft-source = fetchFromBitbucket {
+    owner = "jpommier";
+    repo = "pffft";
+    rev = "29e4f76ac53bef048938754f32231d7836401f79";
+    sha256 = "084csgqa6f1a270bhybjayrh3mpyi2jimc87qkdgsqcp8ycsx1l1";
+  };
+  xmonad-patch = writeText "xmonad-workaround.patch" ''
+    --- a/src/settings.cpp
+    +++ b/src/settings.cpp
+    @@ -20,6 +20,7 @@ static json_t *settingsToJson() {
+     	json_t *tokenJ = json_string(gToken.c_str());
+     	json_object_set_new(rootJ, "token", tokenJ);
+
+    +    /*
+     	if (!windowIsMaximized()) {
+     		// windowSize
+     		Vec windowSize = windowGetWindowSize();
+    @@ -31,6 +32,7 @@ static json_t *settingsToJson() {
+     		json_t *windowPosJ = json_pack("[f, f]", windowPos.x, windowPos.y);
+     		json_object_set_new(rootJ, "windowPos", windowPosJ);
+     	}
+    +    */
+
+     	// opacity
+     	float opacity = gToolbar->wireOpacitySlider->value;
+  '';
+in
+with stdenv.lib; stdenv.mkDerivation rec {
+  name = "VCV-Rack-${version}";
+  version = "0.6.2b";
+
+  src = fetchFromGitHub {
+    owner = "VCVRack";
+    repo = "Rack";
+    rev = "v${version}";
+    sha256 = "17ynhxcci6dyn1yi871fd8yli4924fh12pmk510djwkcj5crhas6";
+    fetchSubmodules = true;
+  };
+
+  prePatch = ''
+    ln -s ${pfft-source} dep/jpommier-pffft-source
+
+    mkdir -p dep/include
+
+    cp dep/jpommier-pffft-source/*.h dep/include
+    cp dep/nanosvg/src/*.h dep/include
+    cp dep/nanovg/src/*.h dep/include
+    cp dep/osdialog/*.h dep/include
+    cp dep/oui-blendish/*.h dep/include
+
+    substituteInPlace include/audio.hpp --replace "<RtAudio.h>" "<rtaudio/RtAudio.h>"
+    substituteInPlace compile.mk --replace "-march=nocona" ""
+    substituteInPlace Makefile \
+       --replace "-Wl,-Bstatic" "" \
+       --replace "-lglfw3" "-lglfw"
+  '';
+
+  enableParallelBuilding = true;
+
+  nativeBuildInputs = [ makeWrapper pkgconfig ];
+  buildInputs = [ glfw-git alsaLib curl glew gtk2-x11 jansson libjack2 libzip rtaudio rtmidi speex ];
+
+  patches = [ xmonad-patch ];
+  buildFlags = "Rack";
+
+  installPhase = ''
+    install -D -m755 -t $out/bin Rack
+    cp -r res $out/
+
+    mkdir -p $out/share/rack
+    cp LICENSE.txt LICENSE-dist.txt $out/share/rack
+
+    # Override the default global resource file directory
+    wrapProgram $out/bin/Rack --add-flags "-g $out"
+  '';
+
+  meta = with stdenv.lib; {
+    description = "Open-source virtual modular synthesizer";
+    homepage = http://vcvrack.com/;
+    # The source is BSD-3 licensed, some of the art is CC-BY-NC 4.0 or unfree
+    license = [ licenses.bsd3 licenses.cc-by-nc-40 licenses.unfree ];
+    maintainers = with maintainers; [ moredread ];
+    platforms = platforms.linux;
+  };
+}