fix: add ROOT libraries to LD_LIBRARY_PATH
Spack v0.19 install ROOT with the option gnuinstall, which places the libraries in /usr/local/lib/root. Generally a sane idea, but it also means some downstream 'stuff' doesn't find them.
Spack v0.19 install ROOT with the option gnuinstall, which places the libraries in /usr/local/lib/root. Generally a sane idea, but it also means some downstream 'stuff' doesn't find them.