Hi again,
Let me re-answer because I think I screwed in a couple of points.
So, you are not trying to use other build directory but a different source
directory.
That's a little bit different. Instead of making a `chdir` you need to touch
the `srcdir` variable.
In that case, you can change the current directory in a previous phase, adding
a new phase before the `configure` step that just jumps to source code just
like `hypre` does.
Run `guix edit hypre` to see it:
``` scheme
(add-before 'configure 'chdir-src
(lambda _ (chdir "src")))
```
Probably this last option is the best, I'm not sure if it works. It should.
Sorry for the misunderstanding!
Good luck,
Ekaitz
