Emulator

What's the problem? Describe what went wrong.

Build fails on Ubuntu Linux with the following message:

Error copying directory from "/usr/lib/x86_64-linux-gnu/cmake/Qt5/../../../plugins/platforms" to "/tmp/cfambuild/Binaries/platforms".
make[2]: *** [Source/Core/DolphinQt/CMakeFiles/dolphin-emu.dir/build.make:2907: Binaries/dolphin-emu] Error 1
make[2]: *** Deleting file 'Binaries/dolphin-emu'
make[1]: *** [CMakeFiles/Makefile2:2434: Source/Core/DolphinQt/CMakeFiles/dolphin-emu.dir/all] Error 2
make: *** [Makefile:156: all] Error 2

What steps will reproduce the problem?

Here are my build steps:

docker run -it --rm ubuntu:20.04

# in the docker container:

ln -fs /usr/share/zoneinfo/Europe/Zurich /etc/localtime
export DEBIAN_FRONTEND=noninteractive
apt update -y -qq && apt install -y -qq git cmake g++ libxi-dev libudev-dev libevdev-dev qt5-default qtbase5-private-dev
git clone --single-branch  https://github.com/dolphin-emu/dolphin.git workspace
cd workspace
git submodule update --init --recursive
mkdir build
cd build
cmake ..
make

Is the issue present in the latest development version? For future reference, please also write down the version number of the latest development version.

The build fails starting from this commit on master:
https://github.com/dolphin-emu/dolphin/commit/daf8e3dddef12016df0d1641c223810c0d128979

Is the issue present in the latest stable version?

No

Build passes fine with the previous commit:
https://github.com/dolphin-emu/dolphin/commit/dd0485389e0f1d18a2df858a6bd549007612a492