Fix CI, I think

Signed-off-by: Adrian C. Hinrichs <adrian.hinrichs@rwth-aachen.de>
Status Job ID Name Coverage
  Build
failed #356653
pontifexemacsimus-dind
build testing

00:03:11

 
  Deploy
skipped #356654
cluster
deploy
 
Name Stage Failure
failed
build testing Build
  3700K .......... .......... .......... .......... .......... 97%  207M 0s
3750K .......... .......... .......... .......... .......... 98% 190M 0s
3800K .......... .......... .......... .......... .
. 100% 306K=0.7s

2019-06-02 20:45:12 (5.56 MB/s) - 'qag2_501bas.zip' saved [3935181/3935181]

/bin/sh: 1: unzip: not found
The command '/bin/sh -c wget http://www.gust.org.pl/projects/e-foundry/tex-gyre/adventor/qag2_501bas.zip && unzip qag2_501bas.zip -d ~/.fonts' returned a non-zero code: 127
ERROR: Job failed: exit code 127