anchor.diff:        substituteInPlace $out/share/applications/slack.desktop \
           --replace /usr/bin/ $out/bin/ \
           --replace /usr/share/ $out/share/
  +
  +      runHook postInstall
       '';
     };
   
  
positive.code:     sourceRoot = "Slack.app";
  
      installPhase = ''
        mkdir -p $out/Applications/Slack.app
        cp -R . $out/Applications/Slack.app
        /usr/bin/defaults write com.tinyspeck.slackmacgap SlackNoAutoUpdates -bool YES
      '';
    };
  in
  
negative.code:     dontPatchELF = true;
  
      installPhase = ''
        runHook preInstall
  
        # The deb file contains a setuid binary, so 'dpkg -x' doesn't work here
        dpkg --fsys-tarfile $src | tar --extract
        rm -rf usr/share/lintian
  