{ buildApp, nextcloudVersion }:
let
  files_mindmap_0_0_25_fix = buildApp rec {
    appName = "files_mindmap";
    version = "0.0.25";
    url = "https://github.com/ACTom/${appName}/releases/download/v${version}/${appName}-${version}.tar.gz";
    sha256 = "1z4bi4i8gw0azf6vn78014sal4gajsapkc6w99n89pb0jyy13551";
    installHook = self: ''
      # https://github.com/ACTom/files_mindmap/issues/122
      ln -s ${self}/img/mindmap.svg $out/core/img/filetypes/
    '';
  };
  files_mindmap_0_0_25 = buildApp rec {
    appName = "files_mindmap";
    version = "0.0.25";
    url = "https://github.com/ACTom/${appName}/releases/download/v${version}/${appName}-${version}.tar.gz";
    sha256 = "1z4bi4i8gw0azf6vn78014sal4gajsapkc6w99n89pb0jyy13551";
  };
  versions = {
    "14" = files_mindmap_0_0_25_fix;
    "15" = files_mindmap_0_0_25_fix;
    "16" = files_mindmap_0_0_25_fix;
    "17" = files_mindmap_0_0_25_fix;
    "18" = files_mindmap_0_0_25_fix;
    "19" = files_mindmap_0_0_25_fix;
    "20" = files_mindmap_0_0_25_fix;
    "21" = files_mindmap_0_0_25;
    "22" = files_mindmap_0_0_25;
  };
in
  versions."${builtins.toString nextcloudVersion}" or (throw "Unsupported version for nextcloud app files_mindmap")