Preprocessing test suite 'test' for Rasterific-0.5...
exec-src/rastertest.hs:26:8:
Could not find module ‘Arbitrary’
Use -v to see a list of the files searched for.
exec-src/rastertest.hs:34:18:
Could not find module ‘Sample’
Use -v to see a list of the files searched for.
Citing from http://hydra.cryp.to/build/536970/nixlog/3/raw: