Hallo Dirk,
the problem I see, shows when inspecting /usr/lib/R/modules/lapack.so with
$ ldd /usr/lib/R/modules/lapack.so | grep blas
libblas.so.3 => /usr/lib/x86_64-linux-gnu/libblas.so.3
(0x00007f58c61b5000)
libopenblas.so.0 => /usr/lib/x86_64-linux-gnu/libopenblas.so.0
(0x00007f58c2dbb000)
Thus, lapack.so of package r-base-core is linked to libopenblas.so.0
which means that r-base-core won't work without package libopenblas-base.
And that is not intended AFAIU.
Regards und Grüße aus Bonn,
Jörg.
