Environment Setup on Linux

We will be using Fedora Linux here as an example, which uses dnf as its package manager.
If you use Majaro or CentOS, you might want to check out the old README.
If you use Arch, please let all of us know.
Run the following commands to install the prerequisites.
dnf -y group install "development-tools"

dnf -y install cmake gcc-c++ wget tar fftw3-devel

Note
You need fftw3-devel, not fftw3
Next comes the important bit.
dnf -y install root

dnf -y install root-tmva root-minuit2 root-spectrum

dnf -y install python3-root

Note
Not root-minuit

The additional ROOT packages above don't come with the default dnf-installed ROOT, at least not as of Oct. 4, 2024.
Lastly, if you somehow don't want to use dnf, you can always use
1. Docker, see the Docker documentation, or
2. Conda, see the Conda documentation.