Konrad Hinsen <konrad.hinsen@fastmail.net> writes:

> Hi Guix,
>
> I am trying to recompile old Fortran code under Guix. I made an (pure)
> environment containing "gfortran" plus a few required tools (make etc.),
> but found that every Fortran compilation stops with an error message
> complaining about "as" missing. Installing gcc-toolchain fixes the
> problem.

'as' is part of Binutils, you don't need the entire toolchain.

That said, there are various other workarounds in Guix due to GCC
(and apparently gfortran) lacking an absolute reference to 'as'.

Can you try the following patch and see if it works for your case?