Please Add the following package list, as an add-on

tessract OCR gimagereader gscan bleachbit parcellite mirage vlc smplayer diffpdf recoll qpdfviewer okular jovie aspell aspell-ml hunspell hunspell-ml firefox>downthemall plugin(this wont work with firefox 57, so don't go for that) midori chromium varnam ibus-m17m

While installing varnam,i am getting error in this line sudo gem install ffi Building native extensions. This could take a while... ERROR: Error installing ffi: ERROR: Failed to build gem native extension.

i have tried apt-get install ruby-dev

Its not solved.plz help me

Made some updates. Try now