Unable to install in Plasma 6

[AsuToki360]

The following error appears:
CMake Error at CMakeLists.txt:13 (find_package):
Could not find a package configuration file provided by "ECM" (requested
version 5.246.0) with any of the following names:

ECMConfig.cmake
ecm-config.cmake

Add the installation prefix of "ECM" to CMAKE_PREFIX_PATH or set "ECM_DIR"
to a directory containing one of the above files. If "ECM" provides a
separate development package or SDK, be sure it has been installed.

I'm on Arch Linux.

[Nick15104]

This solved it for me.

git clone https://invent.kde.org/frameworks/extra-cmake-modules.git
cd extra-cmake-modules
mkdir build && cd build
cmake ..
make && sudo make install

https://superuser.com/questions/850029/could-not-find-a-configuration-file-for-package-ecm-that-is-compatible-with-re