fslint is built using python2 and gtk2 (and some additional dependent libraries), these dependency are not satisfied in some of the latest Linux distributions, (especially Debian & Ubuntu based distro). Hence the ideal way to move forward is to migrate the application to python3 and gtk3.
P.S: will be creating a pull request from https://github.com/krthkj/fslint
fslint is built using python2 and gtk2 (and some additional dependent libraries), these dependency are not satisfied in some of the latest Linux distributions, (especially Debian & Ubuntu based distro). Hence the ideal way to move forward is to migrate the application to python3 and gtk3.
P.S: will be creating a pull request from https://github.com/krthkj/fslint