fixing ci

.gitlab-ci.yml

@@ -7,8 +7,7 @@ build-docs:
   stage: build
   image: python
   before_script:
-    - apt-get -y update
-    - apt-get install libhdf5-dev
+    - pip install --no-binary=h5py h5py
     - pip install tox
   script:
     - tox -e docs