If you have to use a shell that sucks like spim or jdb and doesn't come with the ability to clear the screen. Or is missing features likea history and editing the first line.
Make sure that in the make file, the location for install and uninstall are correct. You just want to make sure that you install to a place on your path. To see path type 'echo $PATH'.
make
make install
ishell <bad shell> <arguments>
ishell mips
ishell jdb ClassFile
It just rm /usr/local/bin/ishell.
make uninstall