Type scons --sconstruct SConstruct-noinkscape
in the command line if you don't have Inkscape all set up to work on the command line.
If you do, scons
should work.
Use scons continuous
to have continuous building after installing inotify.
If you have Inkscape v1.0 and do want to run Inkscape, use
inkscape = Builder(action = 'inkscape --export-type=pdf --export-filename=$TARGET $SOURCE')