Change:
<ins> { stdenv, fetchurl, alsaLib, bzip2, cairo, dpkg, freetype, gdk_pixbuf , glib, gtk2, harfbuzz, jdk, lib, xorg , libbsd, libjack2, libpng , libxkbcommon , makeWrapper, pixman , xdg_utils, zenity, zlib }: stdenv.mkDerivation rec { name = "bitwig-studio-${version}"; version = "1.3.16"; src = fetchurl { url    = "https://downloads.bitwig.com/stable/${version}/bitwig-studio-${version}.deb"; sha256 = "0n0fxh9gnmilwskjcayvjsjfcs3fz9hn00wh7b3gg0cv3qqhich8"; }; nativeBuildInputs = [ dpkg makeWrapper ]; unpackCmd = "mkdir root ; dpkg-deb -x $curSrc root"; dontBuild    = true; dontPatchELF = true; dontStrip    = true; libPath = with xorg; lib.makeLibraryPath [ alsaLib bzip2.out cairo freetype gdk_pixbuf glib gtk2 harfbuzz libX11 libXau libXcursor libXdmcp libXext libXfixes libXrender libbsd libjack2 libpng libxcb libxkbfile pixman xcbutil xcbutilwm zlib ]; binPath = lib.makeBinPath [ xdg_utils zenity ]; installPhase = '' mkdir -p $out cp -r opt/bitwig-studio $out/libexec # Use NixOS versions of these libs instead of the bundled ones. ( cd $out/libexec/lib/bitwig-studio rm libbz2.so* libxkbfile.so* libXcursor.so* libXau.so*  libXdmcp.so* libpng16.so* libxcb*.so* libharfbuzz.so*  libcairo.so* libfreetype.so* ln -s ${bzip2.out}/lib/libbz2.so.1.0.6 libbz2.so.1.0 ) # Use our OpenJDK instead of Bitwig’s bundled—and commercial!—one. rm -rf $out/libexec/lib/jre ln -s ${jdk.home}/jre $out/libexec/lib/jre # Bitwig’s `libx11-windowing-system.so` has several problems: # #   • has some old version of libxkbcommon linked statically (ಠ_ಠ), # #   • hardcodes path to `/usr/share/X11/xkb`, # #   • even if we redirected it with libredirect (after adding #     `eaccess()` to libredirect!), their version of libxkbcommon #     is unable to parse our xkeyboardconfig. Been there, done that. # # However, it suffices to override theirs with our libxkbcommon # in LD_PRELOAD. :-) find $out -type f -executable  -not -name '*.so.*'  -not -name '*.so'  -not -path '*/resources/*' |  while IFS= read -r f ; do patchelf  --set-interpreter $(cat ${stdenv.cc}/nix-support/dynamic-linker)  $f &&  wrapProgram $f  --prefix PATH : "${binPath}"  --prefix LD_LIBRARY_PATH : "${libPath}"  --set LD_PRELOAD "${libxkbcommon.out}/lib/libxkbcommon.so" || true done mkdir -p $out/bin ln -s $out/libexec/bitwig-studio $out/bin/bitwig-studio cp -r usr/share $out/share substitute usr/share/applications/bitwig-studio.desktop  $out/share/applications/bitwig-studio.desktop  --replace /usr/bin/bitwig-studio $out/bin/bitwig-studio ''; meta = with stdenv.lib; { description = "A digital audio workstation"; longDescription = '' Bitwig Studio is a multi-platform music-creation system for production, performance and DJing, with a focus on flexible editing tools and a super-fast workflow. ''; homepage = http://www.bitwig.com/; license = licenses.unfree; platforms = [ "x86_64-linux" ]; maintainers = with maintainers; [ michalrus mrVanDalo ]; }; } </ins>

Discussion:
There is Bitwig1 and Bitwig2. I for example have only a license for Bitwig1. And I will not pay frequently for features I don't use (because I'm not a professional musican). Right now I use the overrideAttrs to install bitwig1, but it would be smarter to provide an older version as well (most likely there will be a bitwig3 someday). I could create a pull-request, just wanted to open a quick discussion first, because I'm new to NixOs and maybe there is already a very smart thing that makes live much simpler, which I'm not aware.
See . I think we shouldn't distribute paid updates for proprietary software under the same attribute without a way to opt out (other than rollback), this heavily breaks reverse compatibility. I think that should point to the latest version, with and pointing to specific major versions. Derivation for 2.x branch may override 1.x, since it has same dependencies and layout, the only difference is additional dependency on :