Change:
<del> { lib , fetchFromGitHub , stdenv , wrapQtAppsHook , substituteAll , SDL2 , frei0r , ladspaPlugins , gettext , mlt , jack1 , pkg-config , fftw , qtbase , qttools , qtmultimedia , qtcharts , cmake , Cocoa , gitUpdater }: stdenv.mkDerivation (finalAttrs: { pname = "shotcut"; version = "24.06.26"; src = fetchFromGitHub { owner = "mltframework"; repo = "shotcut"; rev = "v${finalAttrs.version}"; hash = "sha256-9eQF3s4BAUK81/94z7cMkd2NWdNLVMraP08qsDmuAI8="; }; nativeBuildInputs = [ pkg-config cmake wrapQtAppsHook ]; buildInputs = [ SDL2 frei0r ladspaPlugins gettext mlt fftw qtbase qttools qtmultimedia qtcharts ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Cocoa ]; env.NIX_CFLAGS_COMPILE = "-DSHOTCUT_NOUPGRADE"; cmakeFlags = [ "-DSHOTCUT_VERSION=${finalAttrs.version}" ]; patches = [ (substituteAll { inherit mlt; src = ./fix-mlt-ffmpeg-path.patch; }) ]; qtWrapperArgs = [ "--set FREI0R_PATH ${frei0r}/lib/frei0r-1" "--set LADSPA_PATH ${ladspaPlugins}/lib/ladspa" "--prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath ([SDL2] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [jack1])}" ]; postInstall = lib.optionalString stdenv.hostPlatform.isDarwin '' mkdir $out/Applications $out/bin mv $out/Shotcut.app $out/Applications/Shotcut.app ln -s $out/Applications/Shotcut.app/Contents/MacOS/Shotcut $out/bin/shotcut ''; passthru.updateScript = gitUpdater { rev-prefix = "v"; }; meta = with lib; { description = "Free, open source, cross-platform video editor"; longDescription = '' An official binary for Shotcut, which includes all the dependencies pinned to specific versions, is provided on http://shotcut.org. If you encounter problems with this version, please contact the nixpkgs maintainer(s). If you wish to report any bugs upstream, please use the official build from shotcut.org instead. ''; homepage = "https://shotcut.org"; license = licenses.gpl3Plus; maintainers = with maintainers; [ woffs peti ]; platforms = platforms.unix; mainProgram = "shotcut"; }; }) </del>

Discussion:
Shotcut cannot start Steps to reproduce the behavior: Get error message Shotcut works <!-- Please @ people who are in the list of the offending package or module. If in doubt, check for whoever last touched something. --- system: host os: multi-user?: sandbox: version: nixpkgs:
I cannot reproduce it for now, my system is system: host os: multi-user?: sandbox: version: channels(root): nixpkgs: Do you have anything qt related installed in your profile? Maybe there is even interaction with qt applications installed system-wide, if their version is different from 6.6.2. I guess we have to backport this shotcut/mlt version to nixos-23.11 to avoid this.
Thx for fast answer. Nope. I've tried to delete all other possible qt related apps, same result. I am running on sway. Is there a way i can help you to debug this issue?
I've tried to backport shotcut and mlt from unstable to 23.11 branch. Build succeeded but I am having the same error message if I am trying to run shotcut. Have no clue how to find that is wrong...
found it. It seems that it's just a missing qtwayland dependency. Works now. Anyway strange message from qt
could you provide a pull request to fix wayland support for shotcut? just adding qtwayland? (I have no wayland here.)