Install libungif package to fix it.
-Imager needs to have a fairly recent libtiff installed (we know it
-it runs fine with 3.5.5). In the future we might consider supporting older
-libtiff versions. For now you can either configure Imager manually (by
+Imager needs to have a libtiff version of at least 3.5.5. In the
+future we might consider supporting older libtiff versions. For
+now you can either configure Imager manually (by
setting the IM_MANUAL environment variable to 1, in sh:
$ IM_MANUAL=1 perl Makefile.PL