Imager::File::TIFF provides TIFF file format support for Imager. It requires libtiff to be installed, including development files. For Linux distributions this typically requires installation of the associated -dev or -devel package. See Imager::Install for more information. This is currently shipped as part of Imager, but Imager may install with out installing Imager::File::TIFF, so if you need TIFF support, add a dependency on Imager::File::TIFF. Makefile.PL will reject libtiff 3.9.0 due to a bug in that release.