diff --git a/pkgs/applications/networking/instant-messengers/sky/default.nix b/pkgs/applications/networking/instant-messengers/sky/default.nix
deleted file mode 100644
index 33bd4586bfdb..000000000000
--- a/pkgs/applications/networking/instant-messengers/sky/default.nix
+++ /dev/null
@@ -1,86 +0,0 @@
-{ stdenv, fetchurl, file, libX11, libXScrnSaver
-, libGL, qt5, SDL, libpulseaudio
-, libXrandr, libXext, libXcursor, libXinerama, libXi
-, curl, sqlite, openssl
-, libuuid, openh264, libv4l, libxkbfile, libXv, zlib, libXmu
-, libXtst, libXdamage, pam, libXfixes, libXrender, libjpeg_original
-, ffmpeg_3
-}:
- let
-   # Sky is linked to the libjpeg 8 version and checks for the version number in the code.
-   libjpeg_original_fix = libjpeg_original.overrideAttrs (oldAttrs: {
-    src = fetchurl{
-      url = "https://www.ijg.org/files/jpegsrc.v8d.tar.gz";
-      sha256 = "1cz0dy05mgxqdgjf52p54yxpyy95rgl30cnazdrfmw7hfca9n0h0";
-    };
-  });
-in
-stdenv.mkDerivation rec {
-  version_major = "2.1.7369";
-  version_minor = "1";
-  version = version_major + "." + version_minor;
-  pname = "sky";
-  unpackCmd = "ar x $curSrc; tar -xf data.tar.xz";
-  src = fetchurl {
-    url = "https://tel.red/repos/ubuntu/pool/non-free/sky_${version_major + "-" + version_minor}ubuntu+xenial_amd64.deb";
-    sha256 = "0b3j90km3rp5bgaklxw881g0gcy09mqzbhjdfrq4s2np026ql3d9";
-  };
-  buildInputs = [ 
-    file
-    qt5.qtbase
-    SDL
-    ffmpeg_3
-    sqlite
-    openssl
-    openh264
-    pam
-    curl
-    libX11 libXScrnSaver libGL libpulseaudio libXrandr
-    libXext libXcursor libXinerama libXi libuuid libv4l
-    libxkbfile libXv zlib libXmu libXtst libXdamage
-    libXfixes libXrender
-    libjpeg_original_fix
-  ];
-  dontBuild = true;
-
-  installPhase = ''
-    ls -al ./
-    mkdir -p "$out/bin" "$out/lib" "$out/share"
-    cp -a lib/sky/* $out/bin/
-    cp -aR lib/sky/lib64/* "$out/lib/"
-    cp -a lib/sky/man.sh "$out/bin"
-    chmod +x $out/bin/sky
-    cp -a share/* "$out/share"
-  ''
-  ;
-
-
-  postFixup = ''
-    patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib${stdenv.lib.optionalString stdenv.is64bit "64"}:${stdenv.lib.makeLibraryPath buildInputs} $out/lib/libfreerdp-client.so.2.0.0
-    patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib${stdenv.lib.optionalString stdenv.is64bit "64"}:${stdenv.lib.makeLibraryPath buildInputs} $out/lib/libfreerdp-server.so.2.0.0
-    patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib${stdenv.lib.optionalString stdenv.is64bit "64"}:${stdenv.lib.makeLibraryPath buildInputs} $out/lib/libfreerdp-shadow.so.2.0.0
-    patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib${stdenv.lib.optionalString stdenv.is64bit "64"}:${stdenv.lib.makeLibraryPath buildInputs} $out/lib/libfreerdp.so.2.0.0
-    patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib${stdenv.lib.optionalString stdenv.is64bit "64"}:${stdenv.lib.makeLibraryPath buildInputs} $out/lib/libopenh264.so.0
-    patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib${stdenv.lib.optionalString stdenv.is64bit "64"}:${stdenv.lib.makeLibraryPath buildInputs} $out/lib/librdtk.so.1.1.0
-    patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib${stdenv.lib.optionalString stdenv.is64bit "64"}:${stdenv.lib.makeLibraryPath buildInputs} $out/lib/libSDL-1.3.so.0.0.0
-    patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib${stdenv.lib.optionalString stdenv.is64bit "64"}:${stdenv.lib.makeLibraryPath buildInputs} $out/lib/libsipw.so.1.0.0
-    patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib${stdenv.lib.optionalString stdenv.is64bit "64"}:${stdenv.lib.makeLibraryPath buildInputs} $out/lib/libwinpr.so.1.1.0
-    patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib${stdenv.lib.optionalString stdenv.is64bit "64"}:${stdenv.lib.makeLibraryPath buildInputs} $out/lib/libxfreerdp-client.so.2.0.0
-    patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib${stdenv.lib.optionalString stdenv.is64bit "64"}:${stdenv.lib.makeLibraryPath buildInputs} --set-interpreter $(cat $NIX_CC/nix-support/dynamic-linker) $out/bin/sky
-    patchelf --set-rpath $out/lib:${stdenv.cc.cc.lib}/lib${stdenv.lib.optionalString stdenv.is64bit "64"}:${stdenv.lib.makeLibraryPath buildInputs} --set-interpreter $(cat $NIX_CC/nix-support/dynamic-linker) $out/bin/sky_sender
-    sed -i "s#/usr/bin/sky#$out/bin/sky#g" $out/share/applications/sky.desktop
-    sed -i "s#/usr/lib/sky#$out/bin/#g" $out/share/applications/sky.desktop
-  '';
-
-  meta = with stdenv.lib; {
-    description = "Skype for business";
-    longDescription = ''
-      Lync & Skype for business on linux
-    '';
-    homepage = "https://tel.red/";
-    license = licenses.unfree;
-    maintainers = [ maintainers.Scriptkiddi ];
-    platforms = platforms.unix;
-  };
-}
-
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 006903efdc5d..6baaaaefab87 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -515,6 +515,7 @@ mapAliases ({
   seg3d = throw "seg3d has been removed from nixpkgs (2019-11-10)";
   shared_mime_info = shared-mime-info; # added 2018-02-25
   skrooge2 = skrooge; # added 2017-02-18
+  sky = throw "sky has been removed from nixpkgs (2020-09-16)";
   skype = skypeforlinux; # added 2017-07-27
   skydive = throw "skydive has been removed from nixpkgs (2019-09-10)";
   slack-dark = slack; # added 2020-03-27
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 952ddd197807..1fe0c43e78a4 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -22191,10 +22191,6 @@ in
     };
   };
 
-  sky = callPackage ../applications/networking/instant-messengers/sky {
-    qt5 = qt514;
-  };
-
   smplayer = libsForQt5.callPackage ../applications/video/smplayer { };
 
   smtube = libsForQt514.callPackage ../applications/video/smtube {};