combined installs, with cython first

.circleci/config.yml

@@ -32,10 +32,9 @@ jobs:
           command: |
             python3 -m venv venv
             . venv/bin/activate
-            pip install cython
+            python3 -m pip install --upgrade pip
             echo "tox" >> requirements.txt
-            pip install -r requirements.txt
-            pip install -r requirements-test.txt
+            pip install cython -r requirements.txt -r requirements-test.txt
 
       - save_cache:
           paths:

.travis.yml

@@ -21,11 +21,8 @@ notifications:
 
 # Install packages
 install:
-  - travis_retry pip install cython
-  - travis_retry pip install paq lzss
-  - travis_retry pip install coveralls
-  - travis_retry pip install -r requirements.txt
-  - travis_retry pip install -r requirements-test.txt
+  - travis_retry python -m pip install --upgrade pip
+  - travis_retry pip install cython paq lzss coveralls -r requirements.txt -r requirements-test.txt
   - travis_retry python setup.py install
 
 # Run test

azure-pipelines.yml

@@ -84,7 +84,7 @@ jobs:
       versionSpec: '$(python.version)'
       architecture: '$(architecture)'
 
-  - script: python -m pip install --upgrade pip && pip install -r requirements.txt && pip install -r requirements-test.txt
+  - script: python -m pip install --upgrade pip && pip install cython -r requirements.txt -r requirements-test.txt
     displayName: 'Install dependencies'
 
   - script: |