Fpm conditional compilation

I’m trying some conditional compilation with fpm. I tried this approach but it doesn’t seem to work:
I have the following tree:

.
├── app
│   └── main.f90
├── fpm.toml
├── README.md
└── src
    ├── iimas.f90
    ├── local.f90
    └── submod.f90

Where the fpm.toml is:

name = "submod"

[features]
imas.preprocess.cpp.macros = "IMAS"
local.preprocess.cpp.macros = "LOCAL"

[profiles]
default = ["local"]

And these Fortran files:

module submod 
  implicit none
  public

  interface
    module subroutine say_hello
    end subroutine
  end interface

end module submod
#ifdef IMAS
submodule (submod) iimas
implicit none
contains

subroutine say_hello
    print *, "Hello, IMAS!"
end subroutine say_hello

end submodule
#endif
#ifdef LOCAL
submodule (submod) local
implicit none
contains

subroutine say_hello
    print *, "Hello, LOCAL!"
end subroutine say_hello

end submodule
#endif

Now, if I do the following it looks as everything is working as expected:

> fpm run --profile imas
 + mkdir -p build/dependencies
submod.f90                             done.
iimas.f90                              done.
main.f90                               done.
libsubmod.a                            done.
submod                                 done.
[100%] Project compiled successfully.
 Hello, IMAS!
> fpm clean
Delete build, excluding dependencies (y/n)? y
 + rm -rf build/gfortran_343106CD415EB0B2
 + rm -rf build/gfortran_DF0783F549429104
 + rm -rf build/gfortran_55E1FE181FD0F959
> fpm run --profile local
submod.f90                             done.
local.f90                              done.
main.f90                               done.
libsubmod.a                            done.
submod                                 done.
[100%] Project compiled successfully.
 Hello, LOCAL!

But if I don’t clean it before running with a different profile I got the old result.

> fpm run --profile local
Project is up to date
 Hello, LOCAL!
> fpm run --profile imas
submod.f90                             done.
iimas.f90                              done.
main.f90                               done.
libsubmod.a                            done.
submod                                 done.
[100%] Project compiled successfully.
 Hello, LOCAL!

Just to be clear I’m using the latest release.

> fpm --version
Version:     0.13.0, alpha
Program:     fpm(1)
Description: A Fortran package manager and build system
Home Page:   https://github.com/fortran-lang/fpm
License:     MIT
OS Type:     Linux

Thanks in advance.

I am no expert, but was playing with something similar yesterday and discovered that I needed

preprocess

And then the preprocessor can be specified. without this all preprocessor macros are ignored, I think.

Ah, bitten by markdown, try again

In the fpm.toml, I needed the
[preprocess]
clause

Sorry, Android phone & finger trouble, how do I delete this?