GitLab

Commit f355e0af5e1e0a9e212609cfb1a41932c0877bd2 didn't work because
GCC building ignores LDFLAGS when linking libgfortran.so
whereas the latter does not even need zlib and would be linked to
system zlib (if it exists) for nothing.

In our case, there seems to be no zlib code inside the installed files.