[ci] linux builds not working

@tiago.pereira @amohammadi @andre.anjos :

I guess the Linux ci's are down. Could you fix that please ?

Linux 27:

• https://gitlab.idiap.ch/beat/beat.editor/-/jobs/148670

Linux 36:

• https://gitlab.idiap.ch/beat/beat.editor/-/jobs/148684

Linux browser 36:

• https://gitlab.idiap.ch/beat/beat.editor/-/jobs/148682