I added ("alembic" ,alembic) to the inputs and "-DWITH_ALEMBIC=ON" in the configure-flags list.
Unfortunately it didn’t work directly. I get this error from ld --8<---------------cut here---------------start------------->8--- ld: ../../lib/libbf_alembic.a(abc_writer_transform.cc.o): in function `blender::io::alembic::ABCTransformWriter::do_write(blender::io::HierarchyContext&)': /tmp/guix-build-blender-3.0.1.drv-0/blender-3.0.1/source/blender/io/alembic/exporter/abc_writer_transform.cc:101: undefined reference to `Alembic::AbcGeom::v12::XformSample::setMatrix(Imath_2_5::Matrix44<double> const&)' --8<---------------cut here---------------end--------------->8--- So I guess alembic is not accessible. Any idea on how to go on from there? Best, Théo