install libsass on gitlab-ci

1 job for 4-beta-1 in 16 seconds
Status Job ID Name Coverage
  Build
failed #3199
build

00:00:16

 
Name Stage Failure
failed
build Build There is an unknown failure, please try again
$ apt install libsass -y

WARNING: apt does not have a stable CLI interface yet. Use with caution in scripts.

Reading package lists...
Building dependency tree...
Reading state information...
E: Unable to locate package libsass
ERROR: Job failed: exit code 1