diff --git a/overlays/10-previews.nix b/overlays/10-previews.nix
index af6f42e2..e03efba7 100644
--- a/overlays/10-previews.nix
+++ b/overlays/10-previews.nix
@@ -2,11 +2,10 @@ self: super: let
   unstable = import super.sources.nixos-unstable {};
 in {
   inherit unstable;
-  inherit (unstable) cachix cabal2nix;
   nix = self.nix_2_4;
   unstableHaskellPackages = unstable.haskellPackages;
   unstableGhc = unstable.ghc;
-  inherit (unstable) home-assistant vscode-extensions vscode;
+  inherit (unstable) home-assistant vscode-extensions vscode mumble cachix cabal2nix mumble;
   nix-output-monitor = unstable.nix-output-monitor.overrideAttrs (old: {
     src = super.sources.nix-output-monitor;
     buildInputs = old.buildInputs ++ (with unstable.haskellPackages; [streamly optics generic-optics extra safe MemoTrie]);
diff --git a/overlays/mumble/default.nix b/overlays/mumble/default.nix
deleted file mode 100644
index fb2048ed..00000000
--- a/overlays/mumble/default.nix
+++ /dev/null
@@ -1,11 +0,0 @@
-final: prev: {
-  inherit
-    (final.callPackage ./package.nix {
-      avahi = final.avahi-compat;
-      jackSupport = false;
-      speechdSupport = false;
-      pulseSupport = true;
-    })
-    mumble
-    ;
-}
diff --git a/overlays/mumble/fix-rnnoise-argument.patch b/overlays/mumble/fix-rnnoise-argument.patch
deleted file mode 100644
index 78e8ed24..00000000
--- a/overlays/mumble/fix-rnnoise-argument.patch
+++ /dev/null
@@ -1,16 +0,0 @@
-nixpkgs has a more recent rnnoise than the one used by mumble, and rnnoise
-changed the argument rnnoise_create[1],
-
-[1] https://github.com/xiph/rnnoise/commit/231b9c02d14a74cb449a98004cb7a2cf1bdeca2f
-
---- old/src/mumble/AudioInput.cpp	2020-02-18 22:55:32.000000000 -0500
-+++ new/src/mumble/AudioInput.cpp	2020-02-18 22:58:08.000000000 -0500
-@@ -106,7 +106,7 @@
- #endif
- 
- #ifdef USE_RNNOISE
--	denoiseState = rnnoise_create();
-+	denoiseState = rnnoise_create(NULL);
- #endif
- 
- 	qWarning("AudioInput: %d bits/s, %d hz, %d sample", iAudioQuality, iSampleRate, iFrameSize);
diff --git a/overlays/mumble/overlay.nix b/overlays/mumble/overlay.nix
deleted file mode 100644
index 27cd6a3a..00000000
--- a/overlays/mumble/overlay.nix
+++ /dev/null
@@ -1,37 +0,0 @@
-{
-  stdenv,
-  lib,
-  which,
-  file,
-  mumble,
-  mumble_i686,
-}: let
-  binPath = lib.makeBinPath [which file];
-in
-  stdenv.mkDerivation {
-    name = "mumble-overlay-${mumble.version}";
-
-    inherit (mumble) src;
-
-    phases = ["unpackPhase" "installPhase" "fixupPhase"];
-
-    installPhase = ''
-      mkdir -p $out/lib
-      ln -s ${mumble}/lib/libmumble.so.1 $out/lib/
-
-      ${
-        lib.optionalString (mumble_i686 != null) ''
-          mkdir -p $out/lib32
-          ln -s ${mumble_i686}/lib/libmumble.so.1 $out/lib32/
-        ''
-      }
-
-      install -Dm755 scripts/mumble-overlay $out/bin/mumble-overlay
-      sed -i "s,/usr/lib,$out/lib,g" $out/bin/mumble-overlay
-      sed -i '2iPATH="${binPath}:$PATH"' $out/bin/mumble-overlay
-    '';
-
-    meta = {
-      platforms = lib.platforms.linux;
-    };
-  }
diff --git a/overlays/mumble/package.nix b/overlays/mumble/package.nix
deleted file mode 100644
index f993e150..00000000
--- a/overlays/mumble/package.nix
+++ /dev/null
@@ -1,151 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchFromGitHub,
-  pkg-config,
-  qt5,
-  avahi,
-  boost,
-  libopus,
-  libsndfile,
-  protobuf,
-  speex,
-  libcap,
-  alsaLib,
-  python3,
-  cmake,
-  poco,
-  pcre,
-  iceSupport ? false,
-  zeroc-ice,
-  rnnoise,
-  jackSupport ? false,
-  libjack2,
-  pulseSupport ? false,
-  libpulseaudio,
-  grpcSupport ? false,
-  grpc,
-  which,
-  speechdSupport ? false,
-  speechd,
-  nixosTests,
-}: let
-  generic = overrides: source:
-    qt5.mkDerivation (source
-    // overrides
-    // {
-      pname = overrides.type;
-      inherit (source) version;
-
-      patches = source.patches or [];
-      nativeBuildInputs =
-        [pkg-config python3 cmake]
-        ++ (overrides.nativeBuildInputs or []);
-
-      buildInputs =
-        [boost protobuf avahi]
-        ++ (overrides.buildInputs or []);
-
-      passthru.tests.connectivity = nixosTests.mumble;
-
-      meta = with lib; {
-        description = "Low-latency, high quality voice chat software";
-        homepage = "https://mumble.info";
-        license = licenses.bsd3;
-        maintainers = with maintainers; [petabyteboy infinisil];
-        platforms = platforms.linux;
-      };
-    });
-
-  client = source:
-    generic
-    {
-      type = "mumble";
-
-      nativeBuildInputs = [
-        qt5.qttools
-      ];
-
-      buildInputs =
-        [
-          libopus
-          libsndfile
-          speex
-          qt5.qtsvg
-          rnnoise
-          poco
-          pcre
-          speechd
-          zeroc-ice.all
-          libpulseaudio
-        ]
-        ++ lib.optional stdenv.isLinux alsaLib
-        ++ lib.optional jackSupport libjack2;
-
-      configureFlags = [
-        "CONFIG+=no-server"
-      ];
-
-      NIX_CFLAGS_COMPILE = "-w";
-
-      cmakeFlags = [
-        "-Dice=off"
-        "-Dpulseaudio=on"
-        "-Dalsa=on"
-        "-Doverlay-xcompile=off"
-        "-DRELEASE_ID=${source.version}"
-      ];
-
-      installPhase = ''
-        # bin stuff
-        install -Dm755 mumble $out/bin/mumble
-        wrapProgram $out/bin/mumble \
-          --prefix LD_LIBRARY_PATH : "${libpulseaudio}/lib"
-        install -Dm755 $src/scripts/mumble-overlay $out/bin/mumble-overlay
-
-        # lib stuff
-        mkdir -p $out/lib/mumble
-        cp -P libcelt* $out/lib/mumble
-        cp -rP plugins/* $out/lib/mumble
-
-        # icons
-        install -Dm644 $src/scripts/org.mumble_voip.mumble.desktop $out/share/applications/mumble.desktop
-        install -Dm644 $src/icons/mumble.svg $out/share/icons/hicolor/scalable/apps/mumble.svg
-      '';
-    }
-    source;
-
-  server = generic
-  {
-    type = "murmur";
-
-    configureFlags = [
-      "CONFIG+=no-client"
-    ];
-
-    buildInputs =
-      [libcap]
-      ++ lib.optionals grpcSupport [grpc which];
-
-    installPhase = ''
-      # bin stuff
-      install -Dm755 release/murmurd $out/bin/murmurd
-    '';
-  };
-
-  source = rec {
-    version = "1.4.0-development-snapshot-005";
-
-    # Needs submodules
-    src = fetchFromGitHub {
-      owner = "mumble-voip";
-      repo = "mumble";
-      rev = "${version}";
-      sha256 = "sha256:1w16j5idbvvbbisj1jlk5igym2n2f67ia61yynibqbmpvyq0bg3z";
-      fetchSubmodules = true;
-    };
-  };
-in {
-  mumble = client source;
-  murmur = server source;
-}