# Typical Guix container invocation
~/opt/guix/bin/guix environment -C guix --ad-hoc gcc-toolchain:static gdb gsl openblas zlib:static bash ld-wrapper perl vim which gfortran-toolchain ruby

# make WITH_GFORTRAN=1 EXTRA_FLAGS=-L/gnu/store/741057r2x06zwg6zcmqmdyv51spm6n9i-gfortran-7.5.0-lib/lib static