Namespace in Imports field not imported from: ‘libgeos’
  All declared Imports should be used.
Namespace in Imports field not imported from: ‘libgeos’
  All declared Imports should be used.
Namespace in Imports field not imported from: 'libgeos'
  All declared Imports should be used.
Installation failed.
See ‘/home/ripley/R/packages/tests32/sitsfeats.Rcheck/00install.out’ for details.
Namespace in Imports field not imported from: ‘libgeos’
  All declared Imports should be used.
Namespace in Imports field not imported from: ‘libgeos’
  All declared Imports should be used.
Namespace in Imports field not imported from: ‘libgeos’
  All declared Imports should be used.