Rohan's solution again

Author: charleskawczynski

.travis.yml

@@ -10,7 +10,7 @@ branches:
 ## Documentation: http://docs.travis-ci.com/user/languages/julia/
 language: julia
 sudo: true
-dist: trusty
+dist: xenial
 os:
   - linux
   - osx
@@ -24,10 +24,13 @@ notifications:
 env:
     global:
     - PYTHON=python3
-
 before_install:
+ - |
+   if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
+     sudo apt-get update && sudo apt-get install -qq -y python3-pip
+   fi
  - julia -e 'using Pkg; Pkg.add("Conda")'
- - sudo apt update && sudo apt install -y python3-pip
+ - python3 -m pip install --user -U numpy scipy scikit-learn
  - julia -e 'using Conda; Conda.add("scikit-learn")'
  - julia -e 'using Pkg; Pkg.add("PyCall")'
 
@@ -59,4 +62,4 @@ jobs:
                                                       Pkg.instantiate();
                                                       Pkg.build("CalibrateEmulateSample")'
         - julia --color=yes --project=docs/ docs/make.jl
-      after_success: skip
+      after_success: skip