Hi Simon, 
Thanks for your reply! I managed to make it work finally. I'm working with an old code that need this specific version of the package.

Also, this code does not use configure/make/make install of cmake/make/make install way of installing.
Instead I need to run a script exporting variables with a . ./script.sh command
I was wondering if you could give me a hint about how to say in a manifest how to run such script (if possible).
You can find such script attached.

Thanks, 
Pierre
----- Mail original -----
> De: "Simon Tournier" <zimon.toutoune@gmail.com>
> À: "Tobias Geerinckx-Rice" <me@tobias.gr>, "Pierre Clouzet" <pierre.clouzet@inria.fr>, help-guix@gnu.org
> Envoyé: Mardi 28 Novembre 2023 16:42:46
> Objet: Re: Error when installing package, CMAKE_Fortran_COMPILER could be found

> Hi Pierre,
> 
> On Fri, 24 Nov 2023 at 16:53, Tobias Geerinckx-Rice <me@tobias.gr> wrote:
> 
>> It appears that you haven't given the package a FORTRAN compiler to find.  Try
>>
>>   (native-inputs (list gfortran))
> 
> In addition to Tobias’s words, the recipe will fail at the tests:
> 
> --8<---------------cut here---------------start------------->8---
> The following tests FAILED:
>	  1 - ../gmsh-3.0.6-source/demos/post_processing/lowmem-anim.geo (Failed)
>	  4 - ../gmsh-3.0.6-source/demos/simple_geo/antenna.geo (Timeout)
>	  8 - ../gmsh-3.0.6-source/demos/simple_geo/filter.geo (Failed)
>	  9 - ../gmsh-3.0.6-source/demos/simple_geo/hex.geo (Failed)
>	 11 - ../gmsh-3.0.6-source/demos/simple_geo/indheat.geo (Failed)
>	 12 - ../gmsh-3.0.6-source/demos/simple_geo/machine.geo (Timeout)
>	 13 - ../gmsh-3.0.6-source/demos/simple_geo/piece-extr-rec.geo (Failed)
>	 14 - ../gmsh-3.0.6-source/demos/simple_geo/piece-extr.geo (Failed)
>	 16 - ../gmsh-3.0.6-source/demos/simple_geo/pripyrtet.geo (Failed)
>	 18 - ../gmsh-3.0.6-source/demos/simple_geo/sphere.geo (Failed)
>	 29 - ../gmsh-3.0.6-source/tutorial/t13.geo (SEGFAULT)
>	 32 - ../gmsh-3.0.6-source/tutorial/t16.geo (Failed)
>	 33 - ../gmsh-3.0.6-source/tutorial/t17.geo (Failed)
>	 35 - ../gmsh-3.0.6-source/tutorial/t3.geo (Failed)
> --8<---------------cut here---------------end--------------->8---
> 
> Well, IIRC, gmsh has some dependencies, depending on the default options
> selected at configure time.  For instance, see the current Gmsh from the
> module (gnu packages maths), e.g., guix edit gmsh or [1] lists all the
> dependencies:
> 
>    (propagated-inputs
>     (list fltk
>           gfortran
>           glu
>           gmp
>           hdf5
>           lapack
>           libx11
>           libxext
>           mesa
>           metis
>           opencascade-occt))
>    (inputs
>     (list fontconfig
>           libxft
>           python))
> 
> Moreover, I am not sure for this flag you set in your recipe:
> 
>                         "-DCMAKE_INSTALL_PREFIX=/opt/nextsim_gnu/gmsh-3.0.6"
> 
> Hope that helps.
> 
> Cheers,
> simon
> 
> 
> 1: https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/maths.scm#n3233