In particular this is enough to capture the dependencies of the
Mesa DRI drivers:

    $ capsule-capture-libs --dest=lib \
      only-dependencies:path-match:"/usr/lib/x86_64-linux-gnu/dri/*.so"
    $ ls lib
    libbsd.so.0
    libc.so.6
    libdl.so.2
    libdrm_amdgpu.so.1    # etc.

and the drivers themselves:

    $ capsule-capture-libs --dest=mesa-drivers \
      no-dependencies:path-match:"/usr/lib/x86_64-linux-gnu/dri/*.so"
    $ ls mesa-drivers
    i915_dri.so   # etc.

in separate batches.

Signed-off-by: Simon McVittie <smcv@collabora.com>